SAN FRANCISCO (CBS SF) – BART police are investigating the theft Sunday of an iPhone from a woman at the Powell Street station in San Francisco.

Around 1:15 p.m. Sunday, a woman was at the station when a suspect snatched her phone and boarded a Daly City train.

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The victim followed the suspect and tried to get her phone back, but she wasn’t able to, police said.

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The suspect then exited the train at the Civic Center station and fled on foot.

Police described the suspect as a heavy-set black male believed to be about 15 years old with hair in twists who was wearing a blue denim jacket and blue jeans.

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