Essex OPP are investigating a serious single vehicle crash on the 401 near the Puce Rd in Lakeshore.

Around 5:45 a.m. Saturday, a westbound transport truck lost control and flipped into the north ditch.

It lost its load of milk on the shoulder of the roadway.

A 25 year old Mississauga man suffered serious injuries and is currently in surgery.

OPP are not releasing his name at this time.

Charges are pending.

The right lane will remain closed until 12:30 p.m. for clean-up efforts.