Officials with the California Highway Patrol and the Los Angeles County Fire Department responded to a fatal, multi-vehicle crash in Calabasas Monday night that prompted the closure of lanes on both sides of the freeway.

Calls about the crash on the 101 Freeway, near Las Virgenes Road, came in at around 9:12 p.m., officials with L.A. County Fire told KTLA.  

Officials confirmed that one person died and two others had to be rescued from their vehicle.

While it’s unclear exactly what led to the collision and how many cars were involved, two vehicles overturned and landed on opposite sides of the freeway.  

Aerial video from Sky5 showed slow moving traffic backed up in both directions.

A SigAlert that was issued for the westbound 1 and 2 lanes and the 1, 2 and 3 lanes on the eastbound side of the freeway. Lanes were reopened around 2 a.m. Tuesday.

CHP is investigating the cause of the crash.