Federal officials are investigating an explosion at an Air Force recruitment base in a strip mall in Bixby, southeast of Tulsa.
The explosion was reported about 10:30 p.m. Monday at the recruiting center near East 103rd Street and South Memorial, the Federal Bureau of Investigation said.
The door of the center was blown off in the blast and landed in a parking space in front of the storefront and soot-covered windows.
The FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives has been investigating the incident.
The recruiting office was closed at the time and no one was injured.
The FBI is also considering whether Monday night's explosion is connected to recent vandalism at a nearby Air National Guard recruiting station.
"We have not identified a suspect or motive yet", she said, adding that the device that set off the explosion appeared to be a pipe bomb.
Debris after an explosion at a recruiting center in Bixby, Oklahoma. The individual or individuals involved in the incident vandalized the building and slashed tires of vehicles at the center. "There's no known connection, but it's quite ironic that that happened". "We're just working it as a criminal investigation with an explosive".
"It's a little bit comforting that they didn't want to kill anybody". She says he was deployed with the Air Force, but that she didn't know where.
Several federal charges could be filed against the perpetrator, FBI Special Agent Jessi Rice told reporters.
The FBI did not respond to a request for information.