WHITBY, Ont. -- One lane has been re-opened after a truck crash and fuel spill closed the eastbound lanes of Highway 401 in Whitby, east of Toronto this morning.

Provincial police say a tractor trailer was involved in a collision just before 7 a.m., leading to a diesel fuel spill (near Thickson Road.)

Police say about 800 litres of fuel has spilled, and the remaining two eastbound lanes are expected to remain closed until about noon.

Environment Ministry workers have been called in to clean up the spill.

The driver of the truck is being treated for minor injuries.

Police are advising drivers to avoid the area of the crash.