Houston police are investigating a deadly accident on the Southwest Freeway near Gessner which left one car up on the left retaining wall.

The Southwest Freeway turned into a parking lot Saturday afternoon after a three-vehicle crash. Some drivers told Local 2 they were stuck for hours behind a police blockade during the ongoing investigation.

After the wreck, a white truck came to rest on top of a concrete barrier. Two other cars ended up in the grassy median. 

All southbound lanes of the freeway reopened later Saturday night.

Investigators have not released any other information regarding this accident.