CUBA CITY, Wis. (AP) — Authorities say three workers have been rescued after being trapped when a trench caved in near Cuba City.

Lafayette County Sheriff's Chief Deputy Troy Loeffelholz tells WKOW-TV, one worker became trapped Tuesday when one of the walls of the eight-foot deep trench collapsed. Two other workers attempted to come to his aid and became trapped as well.

Authorities say the men were digging the trench to replace a sewer or other underground line when it gave way in the Town of New Diggings.

Loeffelholz says rescuers used a backhoe and other equipment to free the men. At least one was transported by medical helicopter to the hospital.