- 12 updates
The Russian passenger plane crash that killed 50 people, including Briton Donna Bull, was caused by pilot error, investigators said.
Russia's aviation safety watchdog said the pilots of the Boeing 737 somehow let the plane become too slow at a low altitude, resulting in a diving crash that killed all on board.
The Interstate Aviation Committee said the plane's engines and other systems were working fine until the moment it hit the ground.
The crew put the plane's engines on maximum power, raising the nose up at a sharp angle, causing a quick loss of speed - they then tried to gain speed by taking the plane into a dive, but hit the ground at a near-vertical angle.
A picture of the British woman killed in a plane crash in Kazan, Russia, yesterday has been released.
Donna Bull was described by colleagues at Bellerbys College as "a very popular and well-respected member of staff".
The widower of a British woman killed in a Russian plane crash said it was a "very difficult and emotional time" as her family tries to come to terms with the shock and loss.
Robert Crome said Donna Bull was "a wonderful mother" to her children George and Kate, and "kind, thoughtful and caring" to her friends and family".
He said in a statement today: "She was also a dedicated and hard-working professional, as a teacher and educationalist, so her students will all miss her greatly. Words are inadequate to express our grief and loss.
"We hope that the UK and Russian authorities can help to ease any administrative difficulties. We extend our heartfelt sympathies to all those families in Russia who too have lost their loved ones in this tragedy."
Russian investigators are trying to determine why the crew of a plane that crashed at an airport were unable to land on the first attempt.
Alexander Poltinin, the head of the local branch of Russia's Investigative Committee, said they are looking at the possibility of pilot error or equipment failure.
The traffic controller at Kazan airport said the crew told him they were not ready for landing as it was approaching, but did not specify the problem.
One of the plane's two black boxes has been found, Mr Poltinin said, adding it could take weeks to identify some of the victims.
The British national killed when passenger plane crashed in Kazan, western Russia, has been described by her colleague as "a very popular and well-respected member of staff".
James Pitman, managing director for Study Group's higher education division, said A-levels programme manager Donna Bull "will be sorely missed by both her students and colleagues".
Mr Pitman confirmed the "very sad news" of Ms Bull's death and that of her Moscow-based colleague, Yana Baranova.
He said in a statement: "Donna had flown out from the UK to Moscow earlier in the day, where she met Yana, and the two were heading to Kazan for the start of a 10-day marketing trip."
The British national killed when a Russian plane crashed while trying to land at an airport yesterday has been named as Donna Bull.
Ms Bull was "a very popular and well-respected member of staff", her employer Bellerbys College in Cambridge said today.
Flags are flying at half mast outside Russia's Kazan airport today, as Russians mourned 50 people killed in a plane crash.
A Boeing 737 airliner crashed on Sunday as it attempted to land at the airport, located 500 miles (800 kilometres) east of Moscow, killing all 44 passengers and six crew members on board.
The charred wreckage was still on the runway as emergency teams and rescue services continue to work on the airfield.
A memorial area with flowers has been set up outside one of the airport gates where people are paying their respects.
A British national was among 50 people killed when a Boeing 737-500 crashed in Kazan, Russia, on Sunday.
The UK Foreign Office said: "We can confirm the death of a British national in Kazan, Tatarstan, on November 17. We are in touch with local authorities and providing consular assistance to those affected."
A son of the president of Russia's Tatarstan region was named among 50 people thought to have been killed in a plane crash in the region's capital.
Rustam Minnikhanov's son, Irek, was on the flight from Moscow to Kazan, according to a passenger list posted by news websites whose authenticity was confirmed by the regional government.
The plane that crashed in the Russian city of Kazan lost altitude quickly and its fuel tank exploded on impact with the runway, eyewitnesses said.
There were high winds and cloudy skies over the airport in central Russia but temperatures were above zero, according to local reports.
This is the latest disaster involving a plane from Russia's regional airlines, which have a poor safety record.
- In April 2012, at least 31 people were killed when a Russian passenger plane crashed shortly after take-off in Siberia.
- In September 2011, a Yak-42 passenger jet carrying members of a major league ice hockey team came down shortly after takeoff and burst into flames near the Russian city of Yaroslavl, killing 44 people.
- Russia and the former Soviet republics combined had one of the world's worst air-traffic safety records in 2010, with a total accident rate almost three times the world average, according to the International Air Transport Association.