WHITTIER, Calif. (KABC) -- A multi-vehicle crash involving an overturned box truck was causing significant delays on the 605 Freeway in Whittier as the Friday morning commute got underway.[br /][br /]The collision happened about 4:30 a.m. near Whittier Boulevard and left the truck on its side in the northbound lanes and a sedan overturned on the southbound side. The truck's payload of bottled water and beer was scattered across the interstate.[br /][Ads /][br /]Details about possible injuries were not immediately available.[br /][twitter ID="1109092413207805952" /][br /]Traffic was backed up for miles in both directions as crews worked to clear the scene amid multiple lane closures.[br /][Ads /][br /]The cause of the crash was unknown.