A three-car crash, two of which became pinned underneath a large dirt-hauler, jammed the morning commute on the northbound 110 Freeway into downtown L.A. on Thursday.
The collision occurred shortly after 5:30 a.m. just west of Pico Boulevard, according to the California Highway Patrol's incident log.
One of the vehicles was overturned, KTLA-TV reported, and two cars appeared to be stuck underneath the dirt hauler as more than a dozen firefighters worked to clear the scene.
The crash temporarily closed the No. 1 through 3 lanes, prompting a SigAlert and backing northbound traffic up all the way to Florence Avenue during the busy morning commute.
Two lanes remained blocked between the 10 Freeway and Olympic Boulevard as of 6:45 a.m.
CHP Officer Francisco Villalobos said there were no immediate reports of fatalities, but that some people were injured in the crash.
There was no immediate estimate for when all lanes would be cleared.