Two people were hospitalized after shots were fired when a civilian tried to gain unauthorized access to the Little Rock Air Force Base Monday morning.
The base said the suspect was transported to a local hospital in critical condition. A bystander was also transported for non-related medical care and was released.
The base went on lockdown after the incident.
Jacksonville Police Sgt. Dustin Brown said the suspect had attempted to gain access to the base, which is in Jacksonville and about 15 miles northeast of Little Rock. A bomb squad was checking a green SUV parked near a visitor center at the base's main gate.
The air base closed its gates to inbound and outbound traffic after the 9:15 a.m. incident.
"Base officials will continue to coordinate with Jacksonville Police Department, the Air Force Office of Special Investigation and the FBI," a statement from the base said.
The Associated Press contributed to this report.