A police officer was killed in a shooting incident Tuesday at a public transit center outside the Pentagon, according to reports.

The police officer may have been fatally stabbed during the incident, according to new reports that have surfaced since gunfire first erupted shortly before noon.

AP White House reporter Darlene Superville said the suspect was shot by police and died at the scene.

Authorities have not yet revealed the man’s identity.

Pentagon Force Protection Agency Chief Woodrow Kusse said it was “premature” to rule out whether Tuesday’s crime was a terror attack.

The FBI is investigating.

The Pentagon was placed on lockdown after multiple gunshots were fired at Pentagon Transit Center in Arlington, Virginia, according to emergency dispatch reports.

The lockdown has since been lifted.

Officials have not provided many details about exactly what happened, but with the suspect dead police have called off the search for any additional people, according to the Pentagon police chief.

The suspect was initially believed to have fled the scene.

Fox5 DC reported earlier in the day that the gunman may have hopped on an underground train that was headed north toward Maryland. Aerial footage showed police officers combing parking lots in search of a suspect.

The wounded officer died from his injuries but no other details were given, WHUR 96.3 reported.

“We do not yet know the officers’ name or what department he/she belong to,” the station reported on Twitter. “The officer was taken to GW Hospital following the shooting and has now been taken to the Medical Examiner.”

The Associated Press confirmed that a police officer had been among the injured, according to two law enforcement officials who spoke on condition of anonymity.

CNN reported that three law enforcement sources confirmed the death of the officer.

Fox News reported the officer was a member of the Pentagon police force.

Kusse was expected to brief reporters sometime this afternoon, with Pentagon press secretary John Kirby providing more information.

Earlier news reports said at least one person had been wounded, but authorities had yet to confirm the number of casualties.

The Arlington County Fire Department reported “multiple patients,” according to the AP.

Immediately after the gunfire, a body could be seen on the ground near a Metrobus terminal just outside Defense Department headquarters, according to several unconfirmed news reports.

The shooting was believed to have occurred on a platform that is part of the Pentagon Transit Center, the Pentagon Protection Force Protection Agency tweeted. The complex was locked down for approximately 75 minutes before reopening, according to The New York Times.

The bus ramp sits on the southern end of the Pentagon campus. Metrorail trains were ordered to bypass the Pentagon stop as an investigation got underway.

CPR was being administered on at least two people at the scene, where gunfire erupted shortly before 11 a.m., according to KIRO7 TV.

Reports were early and police officials had not yet provided an official account of what happened.

It was not immediately clear who opened fire, or how many shots there were, or whether police had a suspect in custody.

By noon, officials reported the area secure, although the bus terminal was still being treated as an active crime scene. The Metro entrance to the Pentagon was reportedly closed down.

A day earlier in Washington, police arrested a couple carrying a “9mm pistol with a high capacity magazine” near the U.S. Capitol, according to reporters near the scene. A second gun was found in an SUV, according to a news release from the U.S. Capitol Police.

Last year in March, a man was killed after being stabbed in the neck at the same station.

In May, an armed man was shot dead by an FBI agent as he tried to drive through a security checkpoint at CIA headquarters outside D.C.