A brake overload on a BART train caused heavy smoke in the Civic Center station Sunday, prompting an evacuation and suspension of service for nearly an hour.

The incident occurred about 1:36 p.m. when BART police officers at the station heard a loud, explosive noise near the train on the platform, Lt. Tyrone Forte said. Smoke began pouring out from the train and officers evacuated the station, Forte said.

Following an investigation, officers discovered that the smoke and booming sound were caused by an overload on the brakes of the train, which was on the Pittsburg/Bay Point line.

“There were no injuries, no fire, no explosion,” Forte said.

One person was treated for smoke inhalation on the Muni platform, which is right above the BART platform, according to San Francisco fire dispatchers.

BART trains were allowed to begin moving through the station by 2:20 p.m., but the roughly 40 minute closure caused systemwide delays on BART and Muni for much of Sunday afternoon.

akoskey@sfexaminer.com