Belgium issues global arrest warrant for brother tied to Paris attacks

People gather at a makeshift memorial in front of "Le carillon" restaurant one of the site of the attacks in Paris on November 15, 2015, in the 10th district of Paris.

Belgium issued an international arrest warrant Sunday for one of three brothers linked to the brutal attacks in Paris that killed 129 people, as the probe spread across Europe.

As thousands gathered in central Paris in mourning and solidarity, authorities in at least five European countries scrambled to tie together leads and hunt down possible accomplices.