FBI, Bureau of Alcohol, Tobacco, Firearms and Explosives and San Jose police investigators appeared to be digging with shovels at the site this morning...
Authorities still have not said what exploded, but Durzy said he'd been told it was a device of some kind.
``Whatever caused it was pretty strong,'' San Jose Fire Capt. Jose Guerrero said.
Authorities received multiple reports of a smoke detector alarm sounding at 7:34 p.m., Guerrero said, followed a few minutes later by multiple calls of an explosion.
When crews arrived, they found a 6-by-7-foot window had been shattered near a first-floor exit between the network operations center and a nearby building at 2161 N. First St. The window's frame was bent and a light haze covered the area, Guerrero said. No flames, however, were visible, nor was there any other damage. Other debris was in the area, said Guerrero, who couldn't say Tuesday night exactly what the debris was...
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THANK YOU all4one.