Two teens in a stolen car were dead on the scene and two others remain in "very serious" condition following a car crash in south suburban Harvey early this morning. The wreck happened at 2:10 a.m. in the 300 block of East 147th Street (Sibley Boulevard) near a Metra station. A 16-year-old boy and an 18-year-old woman who were back seat passengers were dead on the scene. Two other teens -- a male and female between the ages of 16 and 18 -- were in the front seat and were taken to Advocate Christ Medical Center in Oak Lawn, where their conditions are "very serious. Howard said it was not known if any of the teens had stolen the car and the identities of the victims are not immediately being released.