The southbound lanes of Interstate 95 have reopened in Stafford County after they were closed for several hours Friday morning due to a collision involving two tractor-trailers, police said.

One of the tractor trailers rear-ended the other at about 5:10 a.m. Friday on I-95 south of Exit 133 in Stafford County, Virginia State Police said.

Both vehicles are upright and the drivers of the tractor-trailers weren't injured. However, the impact caused several barrels containing phosphoric acid to fall off one of the vehicles and land in the right southbound lane, police said. Hazmat crews from Fredericksburg and Stafford County worked to contain and clear minor leakage from at least one of the barrels.

Traffic was being detoured at Exit 133 to Route 17 Business, and then to Route 1, according to the Virginia Department of Transportation.