Thirty five people have been killed in an armed attack in an Istanbul nightclub, the city’s governor has revealed.

The gunman, believed to have been dressed in a Santa costume, opened fire inside the Reina nightclub in Istanbul’s Ortaköy district, where hundreds were celebrating the New Year.

A further 40 people are thought to have been wounded in the attack, which has been captured in CCTV footage.

Special forces officers have stormed the building, but the location of the gunman is unknown.

Dailymailuk