Via the Los Angeles Times:
A Metrolink train derailed in Oxnard early today after colliding with a tractor trailer on the tracks. The collision occurred about 5:55 a.m. at the Rice Road crossing, Metrolink spokesman Scott Johnson told the Los Angeles Times. The collision derailed three of the passenger train’s cars and injured at least 30 people, he said. He could not confirm initial reports of casualties. Television images from the scene show train cars lying on their side and the burned-out remains of the truck.
Just two weeks ago seven were killed north of Manhattan when a commuter train collided with an SUV.
UPDATE: CNN reports that the driver of the truck fled the scene on foot and has been apprehended.