Tributes have been paid to three British nationals who died when a Ukrainian plane crashed in Iran.
Mohammed Reza Kadkhoda Zadeh, who owned a dry cleaners, BP engineer Sam Zokaei and PhD student and engineer Saeed Tahmasebi were all on board the flight.
They were among the 176 people from seven countries who died in the crash.
Ukraine International Airlines flight PS752 crashed just after taking off from Imam Khomeini airport at 06:12 local time (02:42 GMT).
The airline said the plane underwent scheduled maintenance on Monday.
A Downing Street spokesman said the UK was “working closely with the Ukrainian authorities and the Iranian authorities” over the crash, and there was “no indication” the plane was brought down by a missile.
As well as the three Britons, the victims in the crash included 82 Iranians, 63 Canadians, 11 Ukrainians – including all of the crew, 10 Swedes, four Afghans and three Germans, Ukraine foreign affairs minister Vadym Prystaiko said.
Rescue teams have been sent to the crash site but the head of Iran’s Red Crescent told state media that it was “impossible” for anyone to have survived the crash.
Tributes were paid locally to Mr Kadkhoda Zadeh, 40, who ran a neighbourhood dry cleaners in Hassocks, West Sussex, and had a nine-year-old daughter.
Steve Edgington from the pet shop next door said he had known Mr Kadkhoda Zadeh for 14 years, and described him as a lovely, hardworking man who was good at his job and loved by staff.
Savvas Savvidis, 36, who rented a room in Mr Kadkhoda Zadeh’s home in Brighton, said he was a “super-nice person”.
“It’s so sad. Before he left we had a conversation, he told me that he spent all his life working, working really hard, and now finally he wants to start to enjoy life a bit more.”
Mr Savvidis described Mr Kadkhoda Zadeh as a humble man who loved his daughter very much.
The dry cleaners closed on Wednesday, with neighbouring businesses telling the BBC that staff were too upset to stay open.
Meanwhile, in a statement, BP said “with the deepest regret” that its employee Mr Zokaei, 42, from Twickenham, was among the passengers.
Mr Zokaei had been on holiday. He had worked for BP for 14 years and was based at the company’s site in Sunbury-on-Thames in Middlesex.
“We are shocked and deeply saddened by this tragic loss of our friend and colleague and all of our thoughts are with his family and friends,” BP said.
A friend of Mr Zokaei, who did not wish to be named, told the BBC they were “still in shock”.
“He was a highly accomplished person. Very clever and very friendly. Always smiling and full of positive energy. He will be sorely missed.
“He was always trying new adventures. He cycled and toured Europe on bikes a few times. He also loved travelling to interesting far out places.”
Also killed was Mr Tahmasebi, 35, who worked as an engineer for Laing O’Rourke in Dartford.
Last year, Mr Tahmasebi married his Iranian partner, Niloufar Ebrahim, who was also named as having died in the crash.
“Everyone here is shocked and saddened by this very tragic news,” said Laing O’Rourke.
“Saeed was a popular and well respected engineer and will be missed by many of his colleagues. Our thoughts are with his family and friends at this most difficult time and we will do all we can to support them through it.”
‘Humble and generous’
Mr Tahmasebi – whose full name was Saeed Tahmasebi Khademasadi – was also a part-time PhD student at Imperial College London’s Centre for Systems Engineering and Innovation.
A spokeswoman for the university said: “We are deeply saddened at this tragic news. Saeed Tahmasebi Khademasadi was a brilliant engineer with a bright future.
“His contributions to systems engineering earned respect from everyone who dealt with him and will benefit society for years to come.
“He was a warm, humble and generous colleague and close friend to many in our community. Our thoughts and sincere condolences are with Saeed’s family, friends and colleagues, as well as all those affected by this tragedy.”
At Prime Minister’s Questions earlier, Boris Johnson and Labour leader Jeremy Corbyn both said their thoughts were with the families of those killed.
A UK Foreign Office spokesman has said: “We are deeply saddened by the loss of life in the plane crash in Iran overnight.”
They said it was “urgently seeking confirmation” about how many British nationals were on board and would be supporting any families affected.
Melinda Simmons, British ambassador to Ukraine, said her thoughts are with those affected.
Ukraine’s state aviation service has forbidden its national airlines from using Iranian airspace from Thursday, with the restrictions in place until an investigation into the cause of the crash has concluded.
Ukraine’s embassy in Tehran and Iranian state television both initially said technical issues caused the crash.
But the embassy later removed this statement and said any comment regarding the cause of the accident prior to a commission’s inquiry was not official.
Ukraine said its entire civilian aviation fleet would be checked for airworthiness and criminal proceedings would be opened into the disaster.
The country’s president warned against “speculation or unchecked theories regarding the catastrophe” until official reports were ready.
Ukrainian International Airlines said the flight disappeared from radar just a “few minutes” after take-off.
The Ukrainian national carrier said according to preliminary data there were 167 passengers and nine crew members on board but its staff were “clarifying the exact number”.
“The airline expresses its deepest condolences to the families of the victims of the air crash and will do everything possible to support the relatives of the victims,” a statement said.
The airline, which is investigating the crash, said the aircraft – a Boeing 737-800 – was built in 2016 and had its last scheduled maintenance on Monday.
There was no sign of any problems with the plane before take-off and the airline’s president said it had an “excellent, reliable crew”.
A statement from Boeing said its “heartfelt thoughts” were with all those affected following the “tragic event”.
There are several thousand Boeing 737-800s in operation around the world which have completed tens of millions of flights. They have been involved in 10 incidents, including this crash, where at least one passenger was killed, aviation safety analyst Todd Curtis told the BBC.
This is the first time a Ukraine International Airlines plane has been involved in a fatal crash.
A 14-year-old boy was knocked off a moped and then stabbed to death by a rival gang in a “violent and frenzied” attack, a court has heard.
Jaden Moodie was allegedly dealing drugs for a gang when he was targeted by a group of five men on 8 January.
Ayoub Majdouline was in a stolen Mercedes which was driven at the victim, causing him to be “catapulted” over the bonnet, the Old Bailey heard.
The 19-year-old, of London, denies murder and possession of a knife.
Prosecutor Oliver Glasgow QC told jurors the five men in the car had armed themselves with knives and had gone to “great lengths” to hide their faces.
“On finding Jaden Moodie, the Mercedes drove straight towards the moped, swerving onto the same side of the road so that it struck Jaden Moodie head on,” he said.
He told the court the victim “did not stand a chance” and his crash helmet had come off when he was struck.
Three men then got out of the car and “repeatedly” stabbed the 14-year-old in a “violent and frenzied attack”, as he lay “defenceless and seriously injured” on the ground, the court was told.
“Fourteen seconds was all it took,” Mr Glasgow added.
Jaden was found with nine stab wounds and bled to death in the road, the jury heard.
Members of the victim’s family gasped and cried out as CCTV footage of the attack was played to the jury.
The prosecutor said the images showed the killers had “no qualms about playing out their petty rivalries using the blade of a knife”.
The Mercedes was abandoned in a quiet cul-de-sac, while a knife and a pair of yellow rubber gloves were thrown away and recovered from a nearby drain the next day, the court was told.
Mr Glasgow said the 14-year-old’s blood and traces of the defendant’s DNA were found on both.
Burnt clothing belonging to Jaden’s attackers was also found in a churchyard, the court was told.
Mr Majdouline disputes playing any part in the attack.
The trial continues.
Police made 14 arrests after four separate London attacks left two teenagers dead and three men injured in the space of 12 hours.
A 18-year-old man was stabbed to death at about 16:42 BST on Friday in Wandsworth, south London.
Police were called minutes later, at 16:54, to Plumstead, south-east London, where a 19-year-old man was shot dead.
In the early hours of Saturday two men were stabbed in Clapham and another was stabbed in Brixton.
The condition of two of the men is not yet known, while the third has injuries not deemed to be life-threatening or changing.
London mayor Sadiq Khan said he was “sickened” following the death of the two teenagers.
Six males – aged between 16 and 19 – have been arrested on suspicion of murder of the teenager in Wandsworth, who died from stab wounds in Deeside Road.
Tooting MP Rosena Allin-Khan said the killing was “heartbreaking” and “absolutely tragic”.
After the shooting in a car park on Hartville Road in Plumstead, three boys aged between 16 and 17 and a 17-year-old girl were arrested on suspicion of murder.
Armed police, local officers, the London Ambulance Service and an air ambulance all attended, but the teenage victim died a short while later.
A section 60 order has been authorised in the Greenwich and Bexley areas.
Police were then called to a fight on Bedford Road near Clapham North Tube station in south-west London at 03:22, where two men suffered slash and stab wounds.
Four men have been arrested – two for violent disorder, one for carrying a bladed instrument and the other for possession of a Taser.
At 04:00 police were called by the ambulance service after an altercation at a pub in Coldharbour Lane in Brixton, south London, where two men were injured.
One was stabbed and remains in hospital while the other received minor injuries.
The two deaths take the total number of murders in London in 2019 to 55.
Last year there were 132 homicides – the highest level for a decade.