Four people are being treated for “non-life threatening injuries” after a stabbing at a live-streamed church service in Sydney on Monday, the latest knife attack to rock the city. Australian police said they had arrested one man, after a member of the congregation at an Assyrian church rushed at the dais and slashed at the bishop, causing pandemonium. Amid the panic and screams, several churchgoers rushed to safety while others tried to subdue the attacker. The ambulance service told AFP that four men aged between 20 and 70 were being treated for injuries, including lacerations. “The injured i…