OKLAHOMA CITY (KFOR)- OKCPD and OKCFD responded to a two-car crash at W Hefner Rd and Lake Hefner Pkwy NB early Saturday morning. Authorities arrived to the scene to two cars crashed with one car flipped. Three people, including a pregnant woman, were extricated from their vehicles shortly after. The three patients were transported to a local hospital with conditions unknown. *UPDATE* OKCPD PIO confirmed the pregnant woman died from her injuries at a nearby hospital. Two other patients are in critical condition. The northbound lanes of Lake Hefner Pkwy at Britton were closed temporarily due to the crash. The scene of the crash is under further investigation. KFOR will update as more information arrives.