Police have identified the victim of Tuesday's fatal collision on Hwy. 401 as 42-year-old Vladimir Bucalov, of Ajax.

Bucalov was killed after a dump truck lost control and rolled over on the man's Mitsubishi Outlander on Hwy. 401 near Yonge Street at around 4:30 p.m. Tuesday.

Three others were taken to hospital with non-life threatening injuries.

Police say the are unsure why the driver of the dump truck lost control of the vehicle and the collision is still under investigation.

All eastbound express lanes on Highway 401 were closed at Allen Road until about 3 a.m. Wednesday.

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