BRUSSELS — A man wounded two police officers with a knife in Brussels around noon on Wednesday in what authorities called “a potential terrorist attack.’’

The two officers were attacked on the Boulevard Lambermont in the Schaerbeek district, just north of the city center. A third police officer, who came to their aid, was also injured. None of the three had life-threatening injuries.

The man suspected of carrying out the assault was shot in the leg. He was identified only as Hicham D., 43, a Belgian citizen.

“The provisional results of the investigation indicate that it would be a potential terrorist attack,’’ Eric Van der Sijpt, a spokesman for the federal prosecutor’s office, said in a statement.

Van der Sijpt said Hicham D. was a former soldier and member of the Belgian armed forces, but did not say whether he had been cited before in terrorism investigations.

Earlier Wednesday, bomb scares led to the evacuations of the Gare du Nord, one of the city’s three main train stations, and of the building housing the federal prosecutor’s office, which leads terrorism investigations. The police headquarters for western Brussels was also evacuated, although it was not clear whether it was because of a bomb threat.

The threats did not appear to be connected to the knife attack, authorities said.

New York Times