Shocking Video Shows A Christian Bishop In Sydney Get Stabbed Multiple Times During Sermon In Chuch, 3 Worshippers Stabbed As Well

A bishop and three worshippers have been attacked in another stabbing rampage to rock Sydney, as riot police have been called in to quell mounting tensions in the city's west.

Bishop Mar Mari Emmanuel was preaching at Christ The Good Shepherd Church in Wakeley in Sydney's west on Monday just after 7pm when a man dressed in a dark hoodie walked up to the altar and allegedly stabbed him multiple times.

Horrifying footage of the incident, which was being broadcast live on the church's YouTube page, shows Bishop Emmanuel look up in astonishment as the attacker suddenly rains down blows on his face and head.

The alleged attack has sparked unrest outside the church as hundreds gathered in protest, hurling bottles and bricks at a hastily-erected police barrier as chants of 'an eye for an eye' and 'bring him out' could be heard.

It's understood the crowds believe the alleged attacker is still inside the building.

'A large police response is underway and the public is urged to avoid the area,' a spokesperson for NSW Police said.