A Medford driver who police say tried to flee after hitting a teenager in Central Square was arrested Saturday by Cambridge police.

The driver, identified as 20-year-old Katrina Murphy, allegedly hit a 15-year-old boy, who was walking in a Central Square crosswalk, said Jeremy Warnick, a department spokesman.

After leaving the scene, she allegedly crashed into two parked cars on Massachusetts Avenue and Prospect Street sometime around 7:50 p.m., Warnick said.

Murphy was arrested at the scene, and the victim was transported to a local hospital for head injuries, which appeared to be non-life-threatening, Warnick said.

Murphy is expected to be charged with leaving the scene of a crash after knowingly causing personal injury, Warnick said.


Jordan Frias can be reached at jordan.frias@globe.com.