At around 11:10 pm Tuesday night, LAFD and LAPD responded to a 2 vehicle traffic accident in the 18200 block of Lassen St. Firefighters had extricate one of the drivers who was listed in serious condition. He was treated by paramedics and transported to a local trauma center. The other driver was treated at the scene for a small cut over the eye and released. LAPD VTD was investigating the accident. It was unknown if alcohol or drugs contributed to the crash.