Crews are still working to uncover a semi truck and driver that crashed off of a bridge and into the watery depths of a lake in Oklahoma last week.

The accident happened at around 2:00 p.m. on Thursday, June 21st in Marshall County, Oklahoma.

According to the Oklahoma Highway Patrol, a motorist traveling along the Roosevelt Bridge collided with the semi truck hauling paint and painting supplies, sending it crashing into Lake Texoma before becoming completely submerged and sinking to the bottom.

Both the motorist and unnamed truck driver were killed in the wreck, reported KFor News.

“And I saw the car on fire, and the semi-truck was fully submerged. So I saw air bubbles and stuff,” said Tyler Rowland, a witness swimming in a nearby bay at the time of the wreck.

Since the wreck, divers have attached flotation devices and a tow line to the truck and have been clearing debris from the lake, but have been unable to recover the body of the truck driver, who police say is assumed to have passed away inside the vehicle and sunk to the bottom of the lake.

As of Tuesday, June 26th, officials were still working out how to remove the big rig from the depths of the lake.

“They believe the trailer is still attached to the tractor so they will have to reevaluate and figure something else out before they could actually get it both out,” said Trooper John Ivey.

An estimated date for the completion of the tractor trailer’s removal is not yet known.