6:56 p.m. ET, May 18, 2018

Galveston County judge: "There were really no warning signs"

Investigators ran a criminal history check on the Texas shooting suspect and found no prior contacts with police, Galveston County Judge Mark Henry told CNN.

"What was briefed to the governor and myself was that there were really no warning signs," he told CNN. "They were so subtle that they would have been missed. We have not been able to ascertain any criminal history of the suspect so far or any outward overtures that would be concerning to anyone."

Henry said two explosive devices were found today, but "neither device was capable of detonating or discharging."

"They were two crude attempts to make an IED-looking device but not one that would function," he said.