Two people were injured when a minivan struck a tree in Oakville Sunday morning.

A Halton Regional Police Staff Sergeant said a minivan went into a tree on Upper Middle Road at Trafalgar Road, sometime around 6 a.m.

The tree pushed halfway through the vehicle, trapping two occupants, police said.

A female occupant of the vehicle had to be extricated and was evacuated via Ornge air ambulance in critical condition. She was taken to a trauma centre. Police have no update on her condition.

A male occupant of the vehicle was taken to a local hospital.

The cause of the collision is not yet known.