A gun and bomb attack on Istanbul's Ataturk airport has killed 41 people, at least 13 of them foreigners, and injured more than 230, officials say.
Three attackers arrived in a taxi and began firing at the terminal entrance late on Tuesday. They blew themselves up after police fired back.
PM Binali Yildirim said early signs pointed to so-called Islamic State but no-one has so far admitted the attack.
Recent bombings have been linked to either IS or Kurdish separatists.
Turkey has observed a national day of mourning after a gun and suicide bomb attack on Istanbul's Ataturk airport killed 42 people, including 13 foreign nationals.
Turkish investigators are examining CCTV footage, witness statements and mobile phone video recorded by terrified passengers to try to determine the identity of the attackers.
Authorities have suggested that they were foreign nationals but this has not been confirmed.
Mr Yildirim said one of the attackers blew himself up outside the terminal, while the other two detonated explosives inside, foreign media reports.
Footage on social media shows one moving through the building as people around him flee. He is shot by police and remains on the ground for about 20 seconds before blowing himself up.