BRUSSELS — Belgian media are reporting that explosion-like noises have been heard at a Brussels train station, prompting the evacuation of a main square.

Broadcaster RTL quoted Fires Services spokesman Pierre Meys confirming that some kind of an explosion had happened in the city’s Central station on Tuesday. Meys could not say what had caused the blast, but Reuters and the BBC, citing other Belgian media reports, indicated police had “neutralized” a man inside the station wearing an explosive belt.

The Belgian capital’s Grand Place, a major tourist site, was evacuated along with the station about 656 feet away.

Belgium has been on high alert since suicide bombers killed 32 people on the Brussels subway and at an airport on March 22, 2016.