Warning: this story contains distressing details.

Saskatchewan RCMP said at a news conference Thursday afternoon that they now believe Myles Sanderson did all of the killing in the mass stabbing in the province on Sept. 4, and that his brother Damien Sanderson was one of his victims.

The announcement means Myles is now believed to have killed 11 people in the James Smith Cree Nation and the nearby town of Weldon, Sask. 

Details of when Damien died have not yet been released to the public.

Rhonda Blackmore, commanding officer of the Saskatchewan RCMP, said Thursday that police now believe Damien did not commit any of the homicides. However, she