A SEARCH is under way for a gang of thieves who staged a brazen jewellery heist in North Hollywood, swiping a backpack full of diamonds. The victim told investigators that shortly after he left a friends home, a car hit him from behind, and then another vehicle pulled in front to prevent him from fleeing. At that point, he said five or six suspects wearing black masks and black clothes exited their vehicles, approached his car, smashed the passenger-side window and stole a backpack reportedly containing diamonds valued at about $2 million. ABC News