Update 12.29am: A senior Turkish official said tonight nearly 50 people had been killed in the attack at Istanbul's Ataturk Airport and initial indications were that the so-called 'Islamic State' group was behind the atrocity.
Update 10.16pm: A total of 28 people were killed in attacks on Istanbul's airport with 60 wounded, the Turkish city's governor said.
Earlier, Turkish justice minister Bekir Bozdag said that according to preliminary information, "a terrorist at the international terminal entrance first opened fire with a Kalashnikov and then blew himself up".
Update 8.58pm: Ten people have died in two explosions at Istanbul's Ataturk airport.
Two attackers blew themselves up after police fired at them, an official said.
The state-run TRT television said an explosion hit a control point at the international arrival terminal of the airport.
Other media reported the sound of gunfire at the scene.
Eyewitness Ercan Ceyhan told CNN-Turk that he saw some 30 ambulances enter the airport.
The private DHA news agency said the wounded, among them police officers, were being transferred to Bakirkoy State Hospital.
Turkey has suffered several bombings in recent months linked to Kurdish or so-called 'Islamic State' (IS) militants.
The bombings included two in Istanbul targeting tourists - which the authorities have blamed on the 'IS' group.
At least two explosions have occurred at Ataturk Airport in Istanbul, causing multiple injuries, a Turkish official has said.
An official said it was unclear whether the blasts were caused by bombs or a suicide attack.
Turkish media reported the sound of gunfire at the scene.
UPDATE: Around 40 people wounded in Istanbul airport blast being transported to hospital: broadcaster Haberturk— Reuters (@Reuters) June 28, 2016
Turkey has suffered several bombings in recent months linked to Kurdish or Islamic State group militants.