Police and anti-terrorism investigators have been alerted to the possibility that small groups of extremists have left Syria for France and Belgium with plans to stage attacks, a French security official said.

Two people have been arrested in Belgium on suspicion of planning imminent attacks in Brussels, the federal prosecutor’s office said.

A BABY was among four people killed by a gunman armed with grenades who opened fire on a square packed with children and Christmas shoppers in the Belgian city of Liege.

A LONE gunman armed with grenades opened fire on a square packed with children and Christmas shoppers in the eastern Belgian city of Liege, killing three people and injuring 123 before shooting himself in the head.