Witness of terrorist attack in New Zealand spoke about his rescue - PHOTO

A Christchurch man says he was the last person to make it out of a mosque alive after a deadly terror attack this afternoon.

Report informs that Ramzan Ali, from Christchurch, said fellow Muslims were gunned down next to him as he dived out of the window of the Deans Ave mosque, on the edge of Hagley Park.

"I could say I was blessed, I was lucky. Allah was looking out for me."

Four people are in custody - three men and one woman.

Prime Minister Jacinda Ardern has called the mass shootings a terror attack.

Ali, 62, had been attending regular Friday prayers at the mosque, and said there were around 300 worshippers in the building at the time. He said the sermon was being given when the shooting started.

"I saw people running for all the doors. To get 300 people out of the doorways was not easy, out of two doorways, because he entered through the main door, and there were two more doors on the sides."

He dived behind a bench, although he said his legs would have been visible.

"He just started shooting 'Bang, bang, bang'. My cousin was sitting beside me and he got hit in his leg."