Five carjackings have been lately reported in South Side neighborhoods. In every incident a girl is both sitting within her car or is solely out of doors the car when she is approached by means of one to 4 males dressed in black mask, who demanded her keys and drove off, Chicago police mentioned in a group alert. In two of the robberies somebody flashed a black gun. The carjackings came about: About 10 a.m. Jan. 14 within the 4300 block of South King Drive; About 9:10 p.m. Jan. 16 within the 4100 block of South Vincennes Avenue; About 2:45 p.m. Jan. 18 within the 400 block of East 48th Place; About 11:30 a.m. Jan. 19 within the