<Test at other NASA agency outside Ohio leads to false alarm at Research Center, WEWS
"The head of a NASA Lewis Research Center said that a test was going on at another space agency center, not in Ohio, when they got false reports of a shooter in a building. An employee at NASA Glenn with the same last name as a person at the other center mistakenly received a call at about 9:30 a.m. from an automated system with the message that there "is a shooter in the building." The employee did not realize it was a test. That employee told his supervisor, who then called security and then police, said Director Ramon Lugo III The building was put on lockdown and employees were told to stay in their offices."
Officials: False alarm led to Ohio NASA lockdown, AP
"Dennis Pehotsky, a retired safety officer at the center, said false alarms are common at NASA Glenn. "Crews are working out there all the time and it never ends, false alarms," he said. "They cut into wires and everything else and they set off alarms. This kind of thing happens frequently."
False Alarm Led to Brief Lockdown at Ohio NASA Facility, Police Say, Fox News
"Lt. Don Michalosky with the Cuyahoga County Sheriff's Office says a message was misunderstood Friday morning while NASA was conducting a test of its automated emergency notification system. He says someone who received the message didn't realize it was a test."
GRC Reader note: "People in building 77 were hiding with lights off, and doors locked hoping no one with a gun decided to bust in. And the SWAT team was with guns in the hallway. They even patted down and searched the entire second floor. So all in all it was a pretty interesting day."
Keith's update: This was sent all over GRC after the whole things started. It would seem that there was no advanced notice of this security test: