One person was airlifted to hospital following a serious crash that closed the westbound lanes of Highway 401 west of London on Tuesday afternoon.
The Elgin County Ontario Provincial Police said multiple vehicles collided in the westbound lanes of the highway at Union Road shortly before 1 p.m.
A man suffered serious injuries in the crash. Air Ornge was called in to transport him to hospital.
All westbound lanes of the highway between Union and Iona roads were closed while police investigated the cause of the collision. They re-opened around 4:30 p.m.
