A gunman who drove a mock-up police car killed at least 16 people in an Atlantic Canada shooting rampage, federal police said Sunday, the worst case of its kind in Canadian history.

The shooter, identified as Gabriel Wortman, 51, was shot dead by officers after a 12-hour manhunt in Nova Scotia province ended Sunday morning.

Among the victims was a veteran female constable with the Royal Canadian Mounted Police, which also handles municipal and provincial law enforcement in the province.