Sydney - Middle East Times Int’l: A man has been arrested in connection with a riot that occurred in the aftermath of the alleged stabbing of a bishop in Sydney's south-west on Monday night.

The unrest began after a 16-year-old boy allegedly stabbed Bishop Mar Mari Emmanuel during a mass service at the Assyrian Orthodox Church, Christ The Good Shepherd Church, in Wakeley.

NSW Police executed a search warrant at a home in Doonside on Wednesday afternoon.

There they arrested a 19-year-old man, who was taken to Blacktown Police Station.

It's the first arrest under Strike Force Dribbs, which is investigating the incident.

More arrests are expected.

At least five people including two police officers were injured in the stabbing attack and subsequent riot.

Bishop Mar Mari Emmanuel, who has undergone surgery, sustained lacerations to his head, while 39-year-old Father Isaac Royel received cuts and a shoulder injury during the attack inside the church.

The 16-year-old alleged offender, who has not yet been charged, suffered a finger injury.

Crowds assembled outside the church after the alleged stabbing and clashed with police, with some smashing cars and throwing items.

Six paramedics were forced to take refuge in the church after coming under threat from the crowd.

They were holed up inside for three and a half hours.

By the end of the night, one police officer had sustained a broken jaw and another suffered facial and knee injuries.

New South Wales Police Commissioner Karen Webb declared the stabbing a "terrorist incident" early on Tuesday morning, in a move supported by the Australian Security Intelligence Organisation.

The investigation continues.