A grain truck hit a tree in southern St. Joseph County early Tuesday night, killing the semi driver.

Shortly before 6:15 p.m., police and medics were called to the 69600 block of State Road 331, south of Wyatt and north of Bremen.

State Police say Andrew Ginther, 30, Bremen was southbound on S.R. 331`when for an unknown reason, he drove his truck off the west side of the road into a yard before striking a tree.

Ginther died on the scene.

The semi's trailer rolled over, dumping grain all over the yard.

CLICK HERE for photos of the crash scene.

S.R. 331 was closed between Shively and Tyler Roads.

Investigators are trying to determine the cause of the deadly crash. They don't believe weather was a factor, even though it was raining Tuesday night.