A horror crash has left three people dead after a car collided with a tree.

Three people have died in a horror crash after a car collided with a tree.

Emergency services were called to Stoneville Rd in the Perth Hills — about 30km of Perth’s CBD — around 8.50am on Saturday after a motorist left the road and crashed into a tree.

Three adults who were travelling in the vehicle were tragically killed after suffering critical injuries in the crash.

Following the crash, police closed the stretch of the road to all other traffic while investigations are carried out.

The tragedy is now being investigated by major crash scene investigators from Western Australia’s police force.