The three juveniles were taken to juvenile hall.
Officials said this is at least the fourth cellphone robbery attempt on BART since April. On April 22, a group of more than 40 teens tried to take over a train car at the Oakland Coliseum station and robbed and beat passengers.
RELATED: Dozens of teens rush Oakland BART train, rob passengers
Passengers are urged to be aware of their surroundings and to report any suspicious activity to BART police by calling 510-464-7000.
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