SAUK VILLAGE, Ill. (AP) _ A semitrailer swerved off a highway and crashed into a town house complex, setting off a fiery blaze and killing the driver, authorities said.

The truck slammed into a four-unit town house complex in Sauk Village on Tuesday, said Illinois State Police Trooper James Madden.

Traffic was closed in both directions on Illinois 394, about 30 miles south of Chicago. One man was injured and treated at a hospital where he was listed in good condition, a hospital spokesman said.

Those who were in the town houses at the time of the crash escaped safely as firefighters worked to extinguish the blaze, which had fully engulfed the complex, said Sauk Village Police Chief Cora Beem Beem.

Authorities were investigating why the truck ran off the road.