BART trains delayed after report of rider carrying gun

Commuters are lined up to board a San Francisco train at the MacArthur BART station in Oakland, Calif. on Aug. 30, 2016. Commuters are lined up to board a San Francisco train at the MacArthur BART station in Oakland, Calif. on Aug. 30, 2016. Photo: Paul Chinn, The Chronicle Buy photo Photo: Paul Chinn, The Chronicle Image 1 of / 1 Caption Close BART trains delayed after report of rider carrying gun 1 / 1 Back to Gallery

BART trains were delayed Tuesday morning after police got a report of a rider carrying a firearm, officials said.

Trains were temporarily held at the MacArthur station in Oakland while officers looked for the possibly armed man, who had been riding a Richmond-bound train, said Lt. Kevin Franklin of the BART Police Department.

Trains going in the Pittsburg-Bay Point and Richmond directions were delayed up to 20 minutes at the height of the issues around 10 a.m., transit officials said.

It wasn’t immediately clear if the rider police were looking for had been arrested.

Kimberly Veklerov is a San Francisco Chronicle staff writer. Email: kveklerov@sfchronicle.com Twitter: @kveklerov