The Iowa State Patrol is still looking for the cause of a crash on Highway 30 in Greene County near Grand Junction on Thursday that killed the drivers of two semi-trucks. Killed in the accident were: 22-year-old Robert Pierce of Callender and 47-year-old William Crookshank of Randolph, Minnesota.

Reportedly, a westbound 2000 Peterbilt semi, driven by Randal Walker of Nevada, was slowing to make a left turn when he observed a westbound 2000 Kenworth semi, driven by Crookshank, coming up behind him. The Walker semi attempted to get out of the way and was struck from behind by the Crookshank semi.

The impact sent the Crookshank semi into the eastbound lane of Highway 30 when it struck an eastbound 1992 GM truck operated by Pierce. The trucks burst into flames after the collision.

Both Pierce and Crookshank died at the scene of the accident while Walker escaped injury. Highway 30 was closed for several hours yesterday to allow crews to remove the semis from the accident scene.

Radio Iowa