Suicide bomb blasts have ripped through Turkey’s largest airport, killing up to 50 people and leaving 106 wounded.
Armed attackers struck at Ataturk Airport’s international flights terminal on Tuesday evening.
They set off suicide bombs and sprayed civilians with bullets from automatic weapons in what is thought to have been an ISIS-coordinated atrocity.
Graphic CCTV footage shows the moment one of the deadly explosions goes off near the terminal’s security checkpoint.
The attackers fired indiscriminately at travellers before detonating three bombs, according to eyewitness accounts.
All flights have been diverted from Ataturk, including a British Airways plane from London Heathrow that was due to land hours later.
Flight BA680 landed back at London Gatwick just before midnight on Tuesday.
Officials said the "vast majority" of the injured and dead are Turkish, but foreigners are among the victims.
Turkey's President Erdogan condemned the attack, saying: "It is clear that this attack is not aimed at achieving any result but only to create propaganda material against our country using simply the blood and pain of innocent people."
The British Foreign Office is "urgently seeking further information" out of fears Brits may have been caught up in the attack.
David Cameron interrupted crucial post-Brexit talks with EU leaders to comment on the horror.
He said on Twitter: "Appalled by attack in #Istanbul tonight. Thoughts and prayers with all those affected."