MOORHEAD (KFGO-AM) -- A portable propane torch caused an explosion last month at the Sanford Clinic under construction in Moorhead.
Assistant Fire Marshal Chad Stangeland says gas from the torch accumulated near an elevator shaft where a worker was using it to dry concrete.
No one was hurt, but the explosion caused enough damage to postpone the clinic's grand opening until next month. Sanford originally planned to open the clinic last week.