A sheriff says two people were killed and 19 others injured after a logging truck overturned, spilling its cargo onto a crew of more than two dozen construction workers on a bridge in north Arkansas.

Van Buren County Sheriff Scott Bradley says the wreck occurred Monday afternoon on a U.S. 65 bridge in Clinton, about 70 miles north of Little Rock. Bradley says the logging truck's brakes apparently failed, causing the wreck.

Authorities say the driver of the logging truck suffered minor injuries.

The crews were working on a construction project to widen the bridge from three lanes to five.