A gunman reportedly disguised as a policeman killed at least 16 people in Nova Scotia, Canada, including a female police officer.

According to the Canadian authorities, the gunman went on 12-hour rampage that started on Saturday evening leaving at least 16 people dead in a small town. The perpetrator randomly shot people at several locations in Nova Scotia.

The tragedy took place at around 10:30 p.m. Saturday when the local police received a first call.

The authorities asked residents the rural town of Portapique to be on their guards and lock themselves indoor, after the attack began.

“When police arrived at the scene the members located several casualties inside and outside of the home,” RCMP Chief Superintendent Chris Leather.

Gabriel Wortman, 51, was identified as the perpetrator of the mass shooting, was eventually killed on Sunday following a confrontation with police.

RCMP were led to several crime scenes miles apart beginning in Portapique and stretching to Enfield, where the suspect was found, Leather said. Wortman was believed to have been wearing part of what looked to be an RCMP uniform, and may have been driving a vehicle made to look like a police car, Leather said.

“The fact that this individual had a uniform and a police car at his disposal certainly speaks to it not being a random act,” Leather said.

The motive behind the shootings is still under investigation. Authorities warned that there may be more victims and the number of people killed may be more than 16.

A female police officer lose life protecting people

RCMP Constable Heidi Stevenson was killed responding to the attack

Royal Canadian Mounted Police Constable (RCMP) Heidi Stevenson, who had served in the force for 23 years, was among the 16 enumerated victims.

“Heidi answered the call of duty and lost her life while protecting those she served. Two children have lost their mother and a husband his wife. Parents lost their daughter and countless others lost an incredible friend and colleague,” Commissioner Bergerman said.