Police in Munich exchanged fire with a gunman near the Israeli consulate in Munich on Thursday, fatally wounding him. Authorities said he may have been planning to attack the consulate on the anniversary of the attack during the 1972 Munich Olympics.

No one else was hurt in the shootout shortly after 9 am (local time) in an area near the consulate and a museum on the city’s Nazi-era history. Officers had been alerted to a person carrying a gun in the Karolinenplatz area, near downtown Munich, and returned fire when he shot at them. The suspect, who was carrying an old long gun with a bayonet attached to it, died at the scene.

Five officers were at the scene at the time the gunfire erupted. The police quickly deployed about 500 officers to the area. They said the gunman was an 18-year-old from Austria, but investigators were still looking into his motive. They didn’t give further details on the suspect, who left a car near the scene.

“We have to assume that an attack on the Israeli Consulate possibly was planned early today,” Bavaria’s top security official, state interior minister Joachim Herrmann, told reporters at the scene. “It’s obvious that, if someone parks here within sight of the Israeli Consulate...then starts shooting, it most probably isn’t a coincidence.”

Thursday was the 52nd anniversary of the attack by Palestinian militants on the Israeli delegation at the 1972 Munich Olympics, which ended with the death of 11 Israeli team members, a West German police officer and five of the assailants. “There may be a connection — that must be cleared up,” Bavarian governor Markus Söder said.

The police said there was no evidence of any more suspects connected to the shooting on Thursday.

The Austria Press Agency reported that the assailant, an Austrian citizen with Bosnian roots, had come to the attention of authorities there last year but wasn’t considered high-risk. Without naming sources, it said that data and a game had been found on his cellphone that suggested closeness to Islamic extremist ideology, but an investigation of him for possible membership in the Islamic State group was dropped. Prosecutors in Salzburg wouldn’t immediately comment.

Israel’s foreign ministry said the consulate was closed Thursday due to a memorial ceremony for the 1972 attack and none of its staff was hurt. The nearby Munich Documentation Centre for the History of National Socialism, which opened in 2015 and explores the city’s past as the birthplace of the Nazi movement, also said all of its employees were unharmed.