CHARLESTON, S.C. (AP) — Two utility crewmen are recovering from injuries after their truck plunged four stories from the Ravenel Bridge linking Charleston and Mount Pleasant.

It happened Wednesday when a boom on the truck snagged an overhead traffic sign and was wrenched over the side of the bridge to the ground on the Charleston side of the span.

Rescuers had to cut the two men from the cab of the Sumter Utilities truck. Authorities said the injuries were serious but not life-threatening.

It was not a good day on the bridge.

Earlier, a South Carolina Electric & Gas crew was pulling a rope across the bridge to install a power line. A break mechanism on their machine failed and the rope snapped, breaking three light poles on the bridge.