A track equipment problem has shut down BART train service on a segment of the Berryessa line in the East Bay on Wednesday morning, a spokesperson for the transit agency said.

UNION CITY — An equipment problem on its tracks caused BART to shut down service between its Union City and Bay Fair stations early Wednesday, officials said. The closure affected trains on BART’s green line between the Berryessa and Daly City stations.

BART commuters are advised to seek alternative forms of transportation Wednesday morning between Bay Fair and Union City stations, the Bay Area Rapid Transit District announced. Service is stopped as of 6:49 a.