The girl was walking to school in Queens around 8 a.m. when a male on a girl's bicycle approached her, the New York Police Department said.
He then forcibly took her phone and sped off, authorities said. The girl reported pain in her hand and was treated by a school nurse.
The NYPD released images of surveillance footage of the suspect on the bike and inside a convenience store buying snacks. Robberies in the city are slightly down, according to police data.
As of Sunday, the city experienced 9,647 reported robberies, compared to 9,686 in the same time frame in 2020. Felony assault, however, increased with 16,889 reports. That figure represents a 7% jump from the 15,787 reported last year.