HARTFORD, Conn. (AP) - Two teenagers were killed when their car hit a tree in Hartford and a back-seat passenger was hospitalized with potentially life-threatening injuries. Police say 17-year-old Omar Lawrence and 19-year-old Shamar Williams were found dead scene at about 12:30 a.m. Saturday. Both of the teenagers were from Hartford. An unidentified 22-year-old man who was in the back seat had to be extricated from the 2005 Acura TL and was taken to the hospital. Police were investigating the cause of the crash.