CORPUS CHRISTI, Texas — An armed person wounded a sailor at a Texas naval air station Thursday before fatally shot by security forces, officials said.

Thursday afternoon, the FBI said the incident is being investigated as "terrorism-related."

The U.S. Navy said the security team “neutralized” an active shooter at the Naval Air Station-Corpus Christi at about 6:15 a.m. Thursday. The shooter was shot and killed by security personnel, according to a U.S. official, who spoke on condition of anonymity to discuss details about an ongoing investigation.

Investigators said the shooter attempted to speed through a gate at the base in a vehicle, but security personnel managed to put up a barrier in time to stop him. The shooter then exited the vehicle and opened fire, striking the Navy sailor, who is a member of the security team. The sailor was last reported to be in good condition. 

Investigators were working to determine if there was a second person, described as a person of interest in the case, in the area. 

The injured Navy sailor was shot but was wearing body armor, said another U.S. official who spoke on condition of anonymity to provide information not yet made public.

The FBI in Houston said it will lead the investigation. Neither investigators nor the Navy provided details on the shooter or a possible motive.

Attorney General William Barr was briefed on the shooting, a Justice Department spokeswoman said.

The facility was on lockdown for about five hours Thursday morning, but that was lifted shortly before noon. One gate remained closed.

The Associated Press contributed to this story.