UPDATE: ISIS Gunman Identified in Russian Church Attack

Chilling moment ISIS gunman opens fire in church and kills five women worshippers

Terrorist Khalil Khalilov shouted "Allahu akbar” before he pulled the trigger in the packed church

Orthodox priest Father Pavel: "We had finished the mass and were beginning to leave the church. A bearded man ran towards the church shouting 'Allahu Akbar' ('God is greatest') and killed four people

"He was carrying a rifle and a knife. It is believed he only used the gun in the attacks."

ISIS claimed responsibility saying the attacker was a "soldier of Islam”.

Hieromonch - or monk priest - Ioann Anisimov said: “These were all good people.

“Two of the killed women were sisters, one a doctor well known to all people in Kizlyar, the other a community leader.