Two police officers were stabbed in Brussels on Wednesday in what prosecutors said could have been a terrorist attack.

Brussels is on high alert after bombings in March killed 32 people at the city's airport and in a subway carriage.

According to public broadcaster VRT, one officer was stabbed in the neck and another in the stomach. The attacker then broke the nose of a third policeman who had arrived on the scene.

The attacker, identified as 43-year-old Belgian Hicham D, was shot in the leg and taken away by ambulance, prosecutors said in a statement, adding that the police officers' wounds were not life-threatening.