A bomb threat for Candlestick Park was called into San Francisco police Monday night prior to kickoff for a game between the 49ers and the Pittsburgh Steelers, cops said.

Police checked the area and found no threat, Sgt. Michael Andraychak said. The matter is under investigation, he said.

The game was delayed, however, by a power outage that occurred about 25 minutes before kickoff. That outage pushed the game’s start time back about 20 minutes. The outage was the result of a PG&E transformer that reportedly blew up.

Another power outage occurred around 6:40 p.m. during the second quarter and the game was held up for another 20 minutes. Once the lights were back on, the Niners surged to a 20-3 victory over the Steelers.

rnagle@sfexaminer.com