SAN DIEGO (FOX 5/KUSI) -- One person is dead after a vehicle crashed into a cement barrier and went down a hillside just past downtown San Diego off of Interstate 5 Sunday night. A heavy police presence was at the scene of a single-car crash that happened around 9:10 p.m. Sunday at the off-ramp to Imperial Avenue off of southbound I-5. Suspect arrested in arson series along coastal North County According to the California Highway Patrol traffic incident page, a Kia Soul hit a cement barrier and went down an embankment into some brush when it hit a transformer, which then reportedly hit a pedestrian on the side of the off-ramp. The Imperial Avenue off-ramp and Cesar Chavez Pkwy were closed to traffic Sunday night while crews worked to get the car back up the hillside. The off-ramp was still closed to traffic as of 10:30 p.m. Sunday, according to Caltrans. Bicyclist dies after losing control, crashing in Del Mar According to San Diego Fire-Rescue, one person was injured and was being treated by firefighters at the scene. The CHP traffic incident page as of 10:20 p.m. reports the victim has died. The driver is out of the vehicle. No other information was immediately available. CHP is investigating. SDFD and SDPD assisted at the scene. This is developing. Check back for updates.