Tens of thousdands of customers lost power briefly this morning in Summerville, an outage that affected traffic lights and police work.

Kim Asbill, spokeswoman for South Carolina Electric & Gas, said the outage first was reported at 11:39 a.m. She said 25,483 customers lost electricity for about two minutes, but that “isolated” outages affected 835 customers for 90 minutes.

The cause was traced to a mechanical failure, but Asbill couldn’t give further details.

Traffic lights at some intersections were out, but Capt. Jon Rogers of the Summerville Police Department said no crashes were directly attributed to the outage.