The cooling system for the reactor 4 spent fuel pool at the Fukushima No. 1 power plant temporarily halted Tuesday morning after an alert over electrical equipment was issued, Tokyo Electric Power Co. said.

The operation to remove fuel from the spent fuel pool was also halted. Tepco said workers damaged a cable during drilling work near the electrical equipment.

The alert over the electrical equipment was issued at 9:40 a.m. and the cooling system stopped about five minutes later.