BART trains were delayed throughout the system Wednesday because of a trackside equipment problem, with the Pittsburg/Bay Point line to San Francisco International Airport most significantly affected, agency officials said.

Train service was suspended between the North Concord/Martinez and Pittsburg/Bay Point stations as of mid-Wednesday and was not expected to resume until later in the evening. BART established a bus bridge between the two stations but were cautioning riders to prepare for crowded buses and additional travel times.

Passengers on the Pittsburg/Bay Point line to SFO were encouraged to avoid rush hour trains Wednesday.

Further details on the equipment problem were not readily available.