"Our important investigational work is continuing. Out of respect for the families who have yet to be notified, we cannot provide any additional information at this time," said  Royal Canadian Mounted Police National Headquarters spokeswoman Catherine Fortin in a statement to CNN. 

Police identified the shooter as Gabriel Wortman.

He was also killed in the 12-hour rampage.

A cop was also killed in the shooting.

She was identified as Constable Heidi Stevenson.

Nova Scotia RCMP Commanding Officer, Assistant Commissioner Lee Bergerman said in a statement: "Today is a devastating day for Nova Scotia and it will remain etched in the minds of many, for years to come."

"What has unfolded overnight and into this morning is incomprehensible and many families are experiencing the loss of a loved one. That includes our own RCMP family. It is with tremendous sadness that I share with you that we lost Cst. Heidi Stevenson, a 23-year veteran of the Force who was killed this morning, while responding to an active shooter incident," read the statement.

Police said the attacker may be was wearing a uniform belonging to the RCMP but he was not employed by the force.

"To clarify, the suspect in our active shooter investigation, Gabriel Wortman, is NOT employed by the RCMP but he may be wearing an RCMP uniform. He is considered armed and dangerous. If you see him, do NOT approach and call 911 immediately," the police tweeted.

The police did not provide details about how the suspect died.

Incidentally, mass shooting incident is much rare in Canada as gun ownership laws are stricter than the USA.

In 1989, a college shooting in Quebec left 14 women dead after the killer sent all the men out of the classroom and opened fire, reported BBC.

Canadian PM Justin Trudeau tweeted: " Our hearts go out to everyone affected by the shooting in Nova Scotia. To the Portapique community, we’re keeping all of you in our thoughts. And on behalf of all Canadians, I want you to know that we’re here for you - and we’ll be here for you in the days and weeks ahead."