KTLA is reporting that a 10-15 pile-up on the 405 has closed all but one lane of the freeway Northbound.
A multi-vehicle pile-up on the 405 Freeway in Santa Monica has traffic backed up for miles through West L.A.
At about 4:30 p.m., a big rig smashed into the center divider on the northbound 405 at Wilshire Boulevard, hitting at least 8 vehicles.
The LA Times updates:
The number of injuries was not immediately known, but the CHP confirmed that paramedics were treating a man for a medical emergency, which sources familiar with the incident believe may have been a heart attack.
The pile-up was reported about 4:30 p.m. on the northbound 405 just north of its junction with the 10 Freeway. It was touched off by what CHP officials described as a "runaway truck."