TORONTO (AP) — Police fanned out across more than a dozen crime scenes Monday after a rampage by a gunman disguised as a police officer left at least 18 dead and homes in smoldering ruins in rural communities across Nova Scotia — the deadliest mass shooting in Canada’s history.

Officials said the suspect, identified as 51-year-old Gabriel Wortman, also died in the weekend attack. Authorities did not provide a motive for the killings.

Royal Canadian Mounted Police Chief Superintendent Chris Leather told a news conference Monday that police expect to find more victims once they are able to comb through all the crime scenes, some of which were houses set ablaze as victims were inside, adhering to government calls to stay at home because of the coronavirus pandemic.

Leather said police teams were spread out at 16 locations across central and northern Nova Scotia. He said some of the victims knew Wortman, and some didn’t.

“We’re relatively confident we’ve identified all the crime scenes,” Leather said. “We have had five structure fires, most of those being residences, and we believe there may be victims still within the remains of those homes which burnt to the ground.”

The dead included a police officer. Another was wounded by gunfire and was recovering at home, Leather said.

“The 18 innocent lives lost will be remembered throughout Canada’s history,” Public Safety Minister Bill Blair said .

Canadian Prime Minister Justin Trudeau noted how close-knit the small province of Nova Scotia is.

“The vast majority of Nova Scotians will have a direct link with one or more of the victims. The entire province and country is grieving right now as we come to grips with something that is unimaginable,” Trudeau told a news conference.