Security tightened after Jewish attacks

Belgium officers have launched a nationwide manhunt for a lone suspect in a shooting spree at the Brussels Jewish Museum as the death toll in the attack rose to four.

The attack, which came on the eve of national and European Parliament elections, led officials to immediately raise anti-terror measures and increase protection for Jewish sites.

Video of the attack showed a man calmly walking into the Jewish Museum, getting out a Kalashnikov shoulder rifle and starting to shoot before walking away. No one has claimed responsibility.