A 15-year-old Indigenous boy killed by RCMP in Wetaskiwin, Alta., last week handed a machete and a knife over to police and had run into a field before officers opened fire, Alberta's policing watchdog said Thursday.

In a statement, the Alberta Serious Incident Response Team (ASIRT) provided new details on the final moments leading to the death of Hoss Lightning from Samson Cree Nation.

Lightning died last Friday. According to RCMP, the teen called 911 and told a dispatcher he was being followed by people trying to kill him.