Canadian police said the second suspect in the stabbing deaths of 10 people in the province of Saskatchewan died in custody on Wednesday.

The latest: Royal Canadian Mounted Police commissioner Rhonda Blackmore said at a briefing that Myles Sanderson went into "medical distress" following his arrest on Wednesday afternoon and was taken to a local hospital, where he died.

• Blackmore said she couldn't "speak to the specific manner of death," but "all life-saving measures that we are capable of were taken at that time."

Driving the news: Sanderson was located near the town of Rosthern in Saskatchewan province about 3:30pm local time, according to a statement from the Royal Canadian Mounted Police.

The big picture: Police suspect Sanderson and his brother Damien Sanderson killed 10 people and wounded 18 others in a string of attacks across an Indigenous reserve and in the nearby town of Weldon.

• Wednesday's announcement comes days after Damien Sanderson was found dead on the James Smith Cree Nation.
• He had "visible injuries," which were "not believed to be self-inflicted," Blackmore said at a briefing on Monday.

What they're saying: "Now that Myles is deceased we may never have an understanding of that motivation," Blackmore said, but added: "This evening our province breathing a collective sigh of relief."

Editor's note: This article has been updated with new details throughout.