BRUSSELS — Belgian air traffic controllers continued ****** action on Wednesday, forcing the cancellation of flights at Brussels airport as it struggles to get back up to capacity after the March 22 ******* ********.

Belgian flag carrier Brussels Airlines said that around 50 of its flights to and from the main international Zaventem airport were cancelled.

The ****** action over pensions and staffing has been brewing for months but the stoppage came without warning Tuesday afternoon as controllers called in ****, saying they were unfit to work.

The International Air Transport Association condemned the move, calling it “a kick in the teeth for all the ******* and airport staff who have worked so hard to reconnect Brussels to the ***** after the appalling ********* ****** just three weeks ago.”