Two people have been arrested over a "terrorist" attack outside a synagogue in the English city of Manchester on Thursday in which police shot dead the suspect, a senior officer said.

The attack, which left two dead and three seriously wounded, had been declared a "terrorist incident", added Laurence Taylor, assistant commissioner in counterterrorism policing at London's Metropolitan Police force.

Police at scene after stabbing outside Manchester synagogue wounds four
Police and emergency crews gather outside the scene of a stabbing at a synagogue in in Crumpsall, Manchester, which police say has left two people dead.

This is a developing story and more information will follow.