Box truck overturns in 3-vehicle crash on 5 Freeway in Griffith Park area, leaving 1 person trapped

GRIFFITH PARK, LOS ANGELES (KABC) -- A box truck overturned in a three-vehicle crash Friday morning on the 5 Freeway in the Griffith Park area, leaving one person trapped and snarling traffic.

Firefighters responded at 11:16 a.m. to the crash site on the southbound side of the freeway, near Colorado Boulevard, according to the Los Angeles Fire Department.

"Firefighters are currently working on extrication of one patient," the LAFD said in a statement, adding that southbound traffic would be heavily impacted as the rescue operation, cleanup and investigation continued.

The patient's condition was not immediately available.

Video from AIR7 appeared to show a mangled car on the center median.

The California Highway Patrol said two lanes would remain closed at the scene for at least two hours.

The cause of the crash was unknown.