GRENADA (AP) — The Mississippi insurance commissioner says deputy fire marshals will start investigating a blaze that damaged a railroad bridge.

Commissioner Mike Chaney, who doubles as the state fire marshal, says investigators will be in Grenada on Friday. They will examine the damaged structure that crosses the Yalobusha River near downtown.

Chaney says the bridge caught fire Tuesday, and there is no early indication of what caused it.

The bridge is owned by Iowa Pacific Holdings.