LOS ANGELES - At least 30 people were injured Tuesday when a train collided with a tractor-trailer and derailed northwest of Los Angeles city in US' California. The Metrolink train, en route from Ventura County to Los Angeles, hit the tractor-trailer around 5.55 a.m, Xinhua reported. No fatalaties were, however, reported in the accident. Metrolink spokesman Scott Johnson said that the collision derailed three of the passenger train's cars.