IS makes unusual claim of responsibility for Turkey attack

The Islamic State group on Monday made an unusual claim of responsibility for a major terrorist attack in Turkey, saying a "soldier of the caliphate" carried out the mass shooting at an Istanbul nightclub that killed 39 people as they welcomed the new year.

The group said Christian revelers were targeted in response to Turkish military operations against IS in northern Syria, but most of the dead were foreign tourists from Muslim countries.

New Year's attack on packed Istanbul club leaves 39 dead

An assailant believed to have been dressed in a Santa Claus costume opened fire at a crowded nightclub in Istanbul during New Year's celebrations, killing at least 39 people and wounding close to 70 others in what the province's governor described as a terror attack.

Gov. Vasip Sahin said the attacker, armed with a long-barreled weapon, killed a policeman and a civilian outside the club at around 1:45 a.m. Sunday before entering and firing on people partying inside. He did not say who may have carried out the attack.

Worst mass shooting in US history: 50 slain at gay nightclub

It had been an evening of drinking, dancing and drag shows. After hours of revelry, the party-goers crowding the gay nightclub known as the Pulse took their last sips before the place closed.

That's when authorities say Omar Mateen emerged, carrying an AR-15 and spraying the helpless crowd with bullets. Witnesses said he fired relentlessly — 20 rounds, 40, then 50 and more. In such tight quarters, the bullets could hardly miss. He shot at police. He took hostages.