3 teenage girls arrested in attack on woman on BART - SFGate

"Three teenage girls accused of repeatedly punching a woman in her head as she rode a BART train at West Oakland station were arrested, and an arrest warrant was issued for a fourth suspect"

"The Bay Area transit agency has been under public pressure to arrest those committing crimes on its trains and in its stations especially since a mob of 40 to 60 juveniles swarmed a train at Coliseum Station in East Oakland last month, beating and robbing passengers in a span of less than 5 minutes before fleeing the station into the night."

Our peers?