The incident happened on Monday night in the suburb of Wakeley.

The sermon attack comes just two days after a knife rampage in an eastern Sydney shopping mall killed seven people, including a Pakistani security guard.

According to police, a number of people had been stabbed but none of their injuries were life-threatening.

They claimed to have arrested a man. It was also not immediately clear what weapon was used in the attack.

The bishop has been named by local media as Mar Mari Emmanuel.