Emergency workers in Placentia found the backpack in a storm drain , a sheriff 's spokesman says . The explosives , blasting caps and two igniters were in the backpack and nearby dirt . There was no immediate threat to the public 's safety , added Dekofsky . The explosive devices likely had been there for some time , sheriff 's spokesman says . They have been safely detonated , he says .
Emergency workers in Placentia found the backpack in a storm drain , a sheriff 's spokesman says . The explosives , blasting caps and two igniters were in the backpack and nearby dirt . The explosive devices likely had been there for some time , sheriff 's spokesman says . They have been safely detonated , he says .