The video was short, but graphic. Sunday-afternoon crowds suddenly scattered by the sound of an explosion. Orange flames and black smoke rising into the air as people ran for their lives.

Hours later, Istiklal Street is busy again. Two tables have been placed on either side of the street, draped with cloths and heaped with red carnations. These islands make people slow down, and pause to look. The videos showed them exactly what happened here on Sunday. The mood now is solemn.

Russian men continue to flee the country, by land or air, days after President Vladimir Putin's announcement to mobilize additional forces to bolster his flailing war in Ukraine.

At Istanbul's main airport, a constant stream of Russian men came through the arrivals terminal. Istanbul is a destination of choice because it is one of few places where Russians can travel to without visas, with a long history of Russian tourism.

The Islamic State group claimed responsibility on Monday for a New Year’s Day mass shooting in a packed Istanbul nightclub that killed 39 people and wounded scores. The attack was carried out by a lone gunman who remains at large. Some people jumped into the frigid Bosphorus waterway to save themselves after the attacker began shooting at random in the Reina nightclub just over an hour into the new year. Witnesses described diving under tables as he walked around spraying bullets from an automatic rifle.

The lone American confirmed to have been injured in a New Year's terror attack on an Istanbul nightclub was saved by his cell phone, his brother told local media Monday.

Islamic State claimed responsibility Monday for a New Year’s attack on an upscale Istanbul nightclub that killed at least 39 people, saying it targeted Turkey in retaliation for military operations against the group in neighboring Syria.

ISIS has claimed responsibility for the shooting at an Istanbul nightclub.

The IS-linked Aamaq News Agency said the New Year's attack was carried by a "heroic soldier of the caliphate who attacked the most famous nightclub where Christians were celebrating their pagan feast."

The Islamic State issued a statement on Monday saying it was responsible for the attack on a New Year's Eve celebration at a nightclub in Istanbul, Turkey, in which at least 39 people were killed.

Islamic State claimed responsibility on Monday for a New Year’s Day mass shooting in a packed Istanbul nightclub that killed 39 people, an attack carried out by a lone gunman who remains at large.