A Serbian police officer on Saturday killed a man who shot him in the neck with a crossbow in front of the Israeli embassy in Belgrade, in what the prime minister called a “terrorist act”. Police identified the assailant as being a “convert” to Islam, who was born in 1999 in the town of Mladenovac, some 50 kilometres (30 miles) from Belgrade. The attack happened around 11am (9am GMT) on Saturday in the Serbian capital, when the attacker shot the officer who was on duty outside the Israeli embassy. The policeman in self-defence opened fire from his gun at the attacker “who died as a result of h…