Oakland 8 hours ago Bomb threat at Oakland Arena forces lockdown A bomb threat Thursday night forced a lockdown at the Oakland Arena during a concert, according to Oakland police. US & World Videos 2:56 Cal prepares for ESPN's “College GameDay” 2:51 New campaign aimed to bring people to Oakland 0:53 De La Salle High football heads to London for NFL Academy game 0:41 Cal gets ready to host College GameDay for the first time 1:46 Police activity forced lockdown at Oakland Arena