A gunman disguised as a police officer shot people in their homes and set fires in a rampage across the Canadian province of Nova Scotia that killed 16 people, the deadliest such attack in the country’s history.

Officials said Sunday the suspected shooter was also dead.

A police officer was among those killed.

Several bodies were found inside and outside one home in the small, rural town of Portapique, about 60 miles (100 kilometers) north of Halifax — what police called the first scene. Bodies were also found at other locations.

The assault began late Saturday, and authorities believe the shooter may have targeted his first victims but then began attacking randomly.

Overnight, police began advising residents of the town — already on lockdown because of the coronavirus pandemic — to lock their doors and stay in their basements. Several homes in the area were set on fire as well.

Police identified the man believed to be the shooter as Gabriel Wortman, 51, who was thought to live part-time in Portapique. Authorities said he wore a police uniform at one point and made his car look like a Royal Canadian Mounted Police cruiser.

Police first announced that they had arrested Wortman at a gas station in Enfield, outside Halifax, but later said he had died. It was not clear how, and they did not explain further.

“This is one of the most senseless acts of violence in our province’s history,” said Nova Scotia Premier Stephen McNeil.

The dead officer was identified as Constable Heidi Stevenson, a mother of two and a 23-year veteran of the force. Another officer was also injured.