CHICAGO (WLS) -- Chicago police now say the same person is targeting riders on the CTA's Blue Line.The most recent incident happened November 14 at the Grand Blue Line stop. Police said a male suspect seen in a surveillance image grabbed a woman's phone when she was on the train and then ran away.An earlier robbery was reported back in September at the LaSalle Blue Line station.The suspect is described as 17-20 years old, approximately 5'8" and 160 pounds.Anyone with information is asked to contact Area Central detectives at 312-747-8382.