Multiple cars were believed to be involved in a crash on the southbound Interstate 5 near Camp Pendleton on Wednesday evening, the California Highway Patrol (CHP) confirmed.
The incident occured at approximately 4:02 p.m. near Aliso Creek Rest Area.
According to CHP, there was a substantial amount of blood on the road but it's unknown where it was coming from. At least one vehicle was turned over on its side while other cars may had flipped over. It is unclear how many vehicles are involved in the crash.
CHP says traffic was stopped in all lanes on the southbound side of the freeway. A Sig Alert was issued at approximately 4:34 p.m.
One person was transported to the Naval Medical Center San Diego. The extent of injuries is unknown.
Around 5 p.m., the scene was cleared by officers.
No other information was immediately available.
Check back for updates on this breaking news story.