Chicago police are seeking the public's help in identifying a group wanted in a string of CTA train robberies. The group approached passengers riding on the Red Line train between the Cermak and 95th Street stops and demanded their property, Chicago police said. A group of males is being sought in a string of robberies on a CTA Red Line train.Chicago Police Department The robberies happened:Dec. 20 at 138 W. Cermak Road about 10:23 p.m.Dec. 29 at 15 W. 79th St. about 11p.m.Dec. 29 at 15 W. 95th St. about 10:52 p.m.The group of males are between 15 and 25 years old, police said. Anyone with information is asked to call (312) 745-4447.