Crews removed a trapped driver early Friday after his big rig overturned on a freeway connector in Ontario.
Details regarding the driver's condition were not immediately available.
The truck jack-knifed early Friday morning at the southbound 15 Freeway connector to the eastbound 10 Freeway.
A Siglalert was issued at 5:41 a.m. The connector is expected to remain closed until about 10 a.m.
The truck was loaded with 32,000 pounds of frozen food.