SAN FRANCISCO — Two state legislators have introduced a bill that would form a civilian oversight group for the Bay Area Rapid Transit police.

Assemblyman Tom Ammiano and Sen. Leland Yee, both San Francisco Democrats, introduced the legislation Wednesday, saying it would increase the accountability of BART police.

The bill comes nearly seven weeks after former BART officer Johannes Mehserle fatally shot 22-year-old Oscar Grant on a train station platform in Oakland. BART has since created its own police review committee.

Ammiano and Yee say several major police departments in California, including San Francisco, Los Angeles and San Jose, have civilian oversight bodies.

BART spokesman Linton Johnson says the agency's board is looking into a civilian oversight committee.