DALY CITY (KCBS) – BART police say a group of teenagers punched a passenger and tried to steal the person’s cellphone at the Daly City station Sunday night.

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The victim was attacked sometime after 9 p.m. Police have not released all the details, but they say they were able to detain three teens.

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It is unclear if anyone was seriously hurt, or if the youngsters were part of a larger group.

Sunday’s attempted robbery took place three months after a group of more than 40 juveniles stormed the Coliseum BART Station in Oakland, robbing people of their electronic devices.

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BART police have responded by stepping up patrols.