The Latest on the explosions at Istanbul's Ataturk airport (all times local):

1:20 a.m.

A senior Turkish government official has told The Associated Press all initial indications suggest the Islamic State group is behind the attack at Istanbul's Ataturk airport.

The official also said nearly 50 people were killed in the attack Tuesday at the airport's international terminal and as many as four attackers may have been involved.

The official spoke on condition of anonymity in line with government protocol.

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12:55 a.m.

German Foreign Minister Frank-Walter Steinmeier has condemned the attacks on Ataturk airport in Istanbul that have killed at least 28 people.

He says on the sidelines of an ecumenical Iftar dinner in Berlin that he's shocked by the news.

He says the background of the attacks is still unclear, "but everything suggests that terrorists have once again hit the Turkish metropolis.

"We grieve for the victims and with the relatives. We stand by Turkey."

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12:50 a.m.

U.S. Secretary of State John Kerry says officials are still trying to figure out who attacked the Ataturk airport in Istanbul and what exactly happened.

Kerry was speaking at the Festival of Ideas in Aspen, Colorado.

He says "This is daily fare and that's why I say the first challenge we need to face is countering non-state, violent actors."

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12:40 a.m.

Hundreds of passengers are flooding out of Istanbul's Ataturk airport after an attack that killed at least 28 people.

Twelve-year-old Hevin Zini had just arrived from Dusseldorf with her family and was in tears from the shock.

She tells The Associated Press that there was blood on the ground and everything was blown up to bits.

South African Judy Favish, who spent two days in Istanbul as a layover on her way home from Dublin, had just checked in when she heard an explosion followed by gunfire and a loud bang.

She says she hid under the counter for some time.

Favish says passengers were ushered to a cafeteria at the basement level where they were kept for more than an hour before being allowed outside.

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12:15 a.m.

Turkey's NTV television is quoting Istanbul's governor as saying 28 people were killed in the attack at the city's airport and some 60 people wounded.

Governor Vasip Sahin also told the channel that three suicide bombers carried out the attack Tuesday.

Officials had previously said one or two attackers had blown themselves up at the entrance to the international terminal at the airport after police fired at them.

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12:10 a.m.

Hundreds of passengers are spilling out of Istanbul's Ataturk airport with their suitcases in hand or stacked onto trolleys after two explosions killed at least 10 people.

Others are sitting on the grass, their bodies lit by the flashing lights of ambulances and police cars, which are the only kind of vehicles allowed to reach the airport.

Two South African tourists, Paul and Susie Roos from Cape Town, were at the airport and due to fly home at the time of the explosions Tuesday. They were shaken by what they witnessed.

Paul said: "We came up from the arrivals to the departures, up the escalator when we heard these shots going off."

He added: "There was this guy going roaming around, he was dressed in black and he had a hand gun."

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11:40 p.m.

European Union leaders holding an unprecedented summit about Britain's departure from the bloc are condemning a deadly attack on Istanbul's Ataturk airport.

Belgian Prime Minister Charles Michel tweeted from a closed-door meeting Tuesday in Brussels, "Despicable terror attack. Stand together with people of Turkey."

Dalia Grybauskaite, president of Lithuania, wrote "Our thoughts are with the victims of the attacks at Istanbul airport. We condemn those atrocious acts of violence."

The 28 EU leaders are meeting for an exceptional summit at which Prime Minister David Cameron announced his country has voted to leave the EU. They are also discussing migration via Turkey to the EU.

Two explosions rocked Istanbul's Ataturk airport Tuesday, killing at least 10 people.

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11 p.m.

A Turkish official says two attackers have blown themselves up at Istanbul's Ataturk airport after police fire at them.

Turkish media quoted Justice Minister Bekir Bozdag as saying 10 people were killed in the attack on Tuesday.

Turkey's state-run news agency quoted Bekir Bozdag as saying: "According to the information I was given, a terrorist at the international terminal entrance first opened fire with a Kalashnikov and then blew himself up. We have around 10 martyrs (dead) and around 20 wounded."

The official said the attackers detonated the explosives at the entrance of the international terminal before entering the x-ray security check.

Turkish airports have security checks at both at the entrance of terminal buildings and then later before entry to departure gates.

The official spoke on condition of anonymity in line with government protocol.

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10:25 p.m.

A Turkish official says two explosions have rocked Istanbul's Ataturk airport, wounding multiple people.

The official said Tuesday it was unclear whether the explosions were caused by a suicide attack.

The official spoke on condition of anonymity in line with government protocol.

Turkish media reported the sound of gunfire at the scene.

Turkey has suffered several bombings in recent months linked to Kurdish or Islamic State group militants.