Multiple emergency crews responded to two separate collisions near the junction of Commissioners and Wellington roads in London on Wednesday evening.
The first crash happened shortly before 7 p.m. Witnesses said it involved three different vehicles with no known damage.
While emergency crews were dealing with the incident, another crash occurred.
It sent a vehicle over the median between the eastbound and westbound lanes of Commissioners Road, just west of Wellington Road.
An ambulance attended the scene, but it is unclear if anyone was injured.
Traffic along the westbound lanes of Commissioners Road has been affected from 20 Wednesday.