Amri brought IS greeting for surveillance after attack

Terrorist Anis Amri has at IS supporters brought familiar greeting immediately after the attack in Berlin.

Amri hijacked a truck in the German capital and drove the crowd. He then escaped. In the attack were 12 dead and dozens wounded.

German police arrested a Tunisian on Wednesday for the attack. He would have been a contact of Amri.

Amri was subsequently passed through the Netherlands, Belgium and France to northern Italy. He was December 23 at a station in a suburb of Milan shot dead by police.