Manhunt under way for Istanbul nightclub attacker - video

Ambulances near the scene of an attack in Istanbul, on New Year’s Day. An assailant believed to have been dressed in a Santa Claus costume and armed with a long-barrelled weapon, opened fire at a nightclub in Istanbul’s Ortakoy district. Depo Photos / AP Photo

A manhunt is under way for the attacker who killed dozens in a shooting rampage at an Istanbul nightclub.