Chaos erupted at Berlin's Gay Pride celebrations as a car ploughed into crowds, leaving one dead and 16 injured. German police are on the hunt for a suspect linked to Islamist circles, as the joyous atmosphere of Christopher Street Day turned to fear and confusion.

Berlin police said they have identified a suspect who "is known to police" and has links to "Islamist circles."

A citywide manhunt is underway after a van drove into a crowd during Pride celebrations, known locally as Christopher Street Day (CSD). Police have identified a suspect tied to…