Updated

Police in Baltimore have arrested nine young people after a video shared on Facebook allegedly shows them with a man whose cell phone had just been stolen.

The victim of that theft can be seen on the video asking the teen-agers for his phone back.

Police spokesman T. J. Smith said at a news conference Wednesday that the group — both boys and girls, from 12 to 18 years old — was arrested Tuesday after a second assault several blocks away.

Smith says police believe some in the group also are responsible for a string of assaults last month.