Berlin man hunt: Police tracking Tunisian suspect

Police and emergency workers at the site of a truck plowing at a Christmas market in Berlin Germany

German interior minister Thomas de Maiziere confirmed on Wednesday that authorities have identified a new suspect in the deadly truck attack on a Christmas market in Berlin.

Walid, brother of suspect Anis Amri who was sought in connection with the truck attack on a Christmas market in Berlin, speaks to members of the media near their family home in Oueslatia, Tunisia, Dec. 22, 2016.

It is believed that the man was approached by police during a routine patrol in the Sesto San Giovanni area of Milan in the early hours of Friday morning.

Anis Amri, the Tunisian believed to have rammed a truck into a Berlin Christmas market this week, was well known by police and even counter-terrorism agencies.

Almost 50 people were injured as the truck driver crashed through the laden vehicle through Christmas shoppers at the Kaiser Wilhelm memorial church in the heart of West Berlin.

The Islamic State group, which has explicitly called for its supporters to kill non-believers by running them over with vehicles, claimed responsibility for Berlin attack.

Police in Berlin said they had received 508 tips about the attack as of Tuesday night.

German authorities said they are nearly certain that Amri, 24, was behind the Berlin attack after his fingerprints were found inside the truck cabin, along with documents pertaining to his residency status in Germany. "Those in Europe, kill the crusader pigs, each person to their own ability".

One of the officers, Christian Movio (35), was shot in the right shoulder and underwent surgery for a superficial wound and was in good condition. "One can say that there is one concrete threat less, but the threat of terror is still there, as we all know".

Germany's Suddeutsche Zeitung reported that police had bugged Amri's phone and that he was one of 549 suspects considered risky by the intelligence services.

Jager said Amri was " highly mobile" and had changed addresses in Germany several times before finally ending up in a deportation centre in the south western city of Ravensburg.

Even after their chief suspect's death, German authorities said their investigation into Monday evening's attack - in particular the hunt for accomplices - will continue.