Blasts Not Believed to be Connected
Federal investigators donÂ´t believe that FridayÂ´s pipe bombing at the Twain Harte Post Office is connected to three other Northern California pipe bombings in recent weeks.
One of those blasts was at the Calaveras County Government Center in San Andreas. Even though no one was injured in that explosion, a janitor was knocked off his feet.
No one was hurt in any of the blasts.