The authorities said no injuries had been reported, but two metro stations were closed on Wednesday after the shooting.

All of Brussels' metro lines were back in operation on Wednesday afternoon after a manhunt for armed suspects in the tunnels of the city's underground system brought public transport to a partial standstill.

Belgian police were hunting two suspects in the tunnels of the Brussels metro system on Wednesday after a shooting at a station in the center of the city, the Brussels prosecutor's office said. Alice Rizzo reports.