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A missing Italian woman is feared to be among the victims of the Berlin lorry massacre.

Fabrizia Di Lorenzo, 31, who lives and works in Germany, has been missing since the attack on the crowded Christmas market on Monday night.

Relatives and friends of Ms Di Lorenzo were appealing for information about her in the aftermath of the atrocity, which left 12 people dead and injured 50.

Her mobile phone and travel pass were found at the scene of the attack on the Christmas market near the Kaiser Wilhelm Memorial Church where the articulated lorry careered through huts and stalls packed with visitors.

A person, claiming to be her cousin, said on social media that they had not heard from Ms Di Lorenzo, a transport specialist, since Monday night and that her belongings had been found at the site.

“My cousin (Fabrizia Di Lorenzo) not replying to us since yesterday night. Someone found her phone and metro pass on the site,” the tweet said.

Italian website Repubblica reported that members of her family had travelled to Berlin to submit DNA samples in a bid to identify her.

Fears over her whereabouts were first raised on Tuesday morning when she did not turn up to work, according to the website.

Berlin terror attack: Horror as lorry ploughs into crowds 24 show all Berlin terror attack: Horror as lorry ploughs into crowds 1/24 A tow truck operates at the scene where a truck ploughed through a crowd at a Christmas market on Breitscheidplatz square Pawel Kopczynski/Reuters 2/24 A trail of devastation is left behind, the day after a truck ran into a crowded Christmas market Markus Schreiber/AP 3/24 Debris at the Christmas market on Breitscheidplatz square Markus Schreiber/AP 4/24 Firefighters look at the debris after the trailer has been towed away from the crime scene in Berlin Markus Schreiber/AP 5/24 The damaged towing truck is towed away Matthias Schrader/AP 6/24 A tow truck operates at the scene where a truck ploughed through a crowd at a Christmas market on Breitscheidplatz square Fabrizio Bensch/Reuters 7/24 A damaged windscreen of a truck which ploughed through a crowd at a Christmas market on Breitscheidplatz square Hannibal Hanschke/Reuters 8/24 The smashed window of the cabin of a truck which ran into a crowded Christmas market Markus Schreiber/AP 9/24 A tow truck operates at the scene where a truck ploughed through a crowd at a Christmas market on Breitscheidplatz square Pawel Kopczynski/Reuters 10/24 Rescue workers gather outside a tent in the area after a lorry truck ploughed through a Christmas market Sean Gallup/Getty Images 11/24 An aerial view shows the extent of the damage at the scene where a truck crashed into a Christmas market close to the Kaiser Wilhelm Memorial Church Bernd von Jutrczenka/EPA 12/24 A candle and flowers are seen near the site where a truck ploughed through a crowd at a Berlin Christmas market on Breitscheidplatz square Fabrizio Bensch/Reuters 13/24 Smash: The truck that crashed into a Christmas market, close to the Kaiser Wilhelm memorial church in Berlin. Clemens Bilan/EPA 14/24 Investigation: A German police officer looks into a truck at a Berlin Christmas market following an accident with the truck on Breitscheidplatz square Christian Mang/Reuters 15/24 Horror crash: The damaged front part of a truck is pictured at the scene after it crashed into a Christmas market, Rainer Jensen/EPA 16/24 Security: Policemen and rescue workers secure the site next to a truck at the scene, after it crashed into a Christmas market. Rainer Jensen/EPA 17/24 Mayor: Berlin's Mayor Michael Mueller (left) speaks to the media at the scene where a truck crashed into a Christmas market, close to the Kaiser Wilhelm memorial church in Berlin, Germany. Maurizio Gambarini/EPA 18/24 Christmas: Parts of a Christmas market decoration stick in the windscreen of a truck following an accident. Fabrizio Bensch/Reuters 19/24 Inspection: A specialist in a protective suit talks to police near a truck at a Christmas market in Berlin, Germany. Pawel Kopczynski/Reuters 20/24 Wounded: An injured person is carried on an stretcher by fireman at the scene where a truck crashed into a Christmas market Clemens Bilan/EPA 21/24 Christmas market: German police officers secure the site of an accident with a truck at a Christmas market on Breitscheidplatz square near the fashionable Kurfuerstendamm avenue Christian Mang/Reuters 22/24 Forensic: Experts of the police investigate the crime scene after a truck ran into a crowded Christmas market and killed several people in Berlin, Germany. Michael Sohn/AP 23/24 Survivors: A survivor of an accident with a Polish truck is rescued on a stretcher near a Christmas market on Breitscheidplatz square near the fashionable Kurfuerstendamm avenue Fabrizio Bensch/Reuters 24/24 Injured: Rescue workers push a person on a stretcher in the area after a lorry truck ploughed through a Christmas market Sean Gallup/Getty Images 1/24 A tow truck operates at the scene where a truck ploughed through a crowd at a Christmas market on Breitscheidplatz square Pawel Kopczynski/Reuters 2/24 A trail of devastation is left behind, the day after a truck ran into a crowded Christmas market Markus Schreiber/AP 3/24 Debris at the Christmas market on Breitscheidplatz square Markus Schreiber/AP 4/24 Firefighters look at the debris after the trailer has been towed away from the crime scene in Berlin Markus Schreiber/AP 5/24 The damaged towing truck is towed away Matthias Schrader/AP 6/24 A tow truck operates at the scene where a truck ploughed through a crowd at a Christmas market on Breitscheidplatz square Fabrizio Bensch/Reuters 7/24 A damaged windscreen of a truck which ploughed through a crowd at a Christmas market on Breitscheidplatz square Hannibal Hanschke/Reuters 8/24 The smashed window of the cabin of a truck which ran into a crowded Christmas market Markus Schreiber/AP 9/24 A tow truck operates at the scene where a truck ploughed through a crowd at a Christmas market on Breitscheidplatz square Pawel Kopczynski/Reuters 10/24 Rescue workers gather outside a tent in the area after a lorry truck ploughed through a Christmas market Sean Gallup/Getty Images 11/24 An aerial view shows the extent of the damage at the scene where a truck crashed into a Christmas market close to the Kaiser Wilhelm Memorial Church Bernd von Jutrczenka/EPA 12/24 A candle and flowers are seen near the site where a truck ploughed through a crowd at a Berlin Christmas market on Breitscheidplatz square Fabrizio Bensch/Reuters 13/24 Smash: The truck that crashed into a Christmas market, close to the Kaiser Wilhelm memorial church in Berlin. Clemens Bilan/EPA 14/24 Investigation: A German police officer looks into a truck at a Berlin Christmas market following an accident with the truck on Breitscheidplatz square Christian Mang/Reuters 15/24 Horror crash: The damaged front part of a truck is pictured at the scene after it crashed into a Christmas market, Rainer Jensen/EPA 16/24 Security: Policemen and rescue workers secure the site next to a truck at the scene, after it crashed into a Christmas market. Rainer Jensen/EPA 17/24 Mayor: Berlin's Mayor Michael Mueller (left) speaks to the media at the scene where a truck crashed into a Christmas market, close to the Kaiser Wilhelm memorial church in Berlin, Germany. Maurizio Gambarini/EPA 18/24 Christmas: Parts of a Christmas market decoration stick in the windscreen of a truck following an accident. Fabrizio Bensch/Reuters 19/24 Inspection: A specialist in a protective suit talks to police near a truck at a Christmas market in Berlin, Germany. Pawel Kopczynski/Reuters 20/24 Wounded: An injured person is carried on an stretcher by fireman at the scene where a truck crashed into a Christmas market Clemens Bilan/EPA 21/24 Christmas market: German police officers secure the site of an accident with a truck at a Christmas market on Breitscheidplatz square near the fashionable Kurfuerstendamm avenue Christian Mang/Reuters 22/24 Forensic: Experts of the police investigate the crime scene after a truck ran into a crowded Christmas market and killed several people in Berlin, Germany. Michael Sohn/AP 23/24 Survivors: A survivor of an accident with a Polish truck is rescued on a stretcher near a Christmas market on Breitscheidplatz square near the fashionable Kurfuerstendamm avenue Fabrizio Bensch/Reuters 24/24 Injured: Rescue workers push a person on a stretcher in the area after a lorry truck ploughed through a Christmas market Sean Gallup/Getty Images

Her father was reported as saying “There should be no doubt, waiting for confirmation but I have no illusions.”

Six of the 12 other victims have been identified as German.

On Tuesday night Islamic State claimed responsibility for the attack.

Eleven people died when the articulated lorry ploughed through huts and stalls at the Christmas market, along with a Polish man found shot dead inside the lorry's cab identified as Łukasz Urban.

The 37-year-old was said to have “fought for his life” before being killed by the assailant behind the attack.

Investigators were on Wednesday pouring over every detail of his final hours in Berlin in a search for clues about who might be behind the attack.

Ariel Zurawski, the owner of the trucking company, and the victim’s cousin said it was clear that Mr Urban had engaged in a struggle.

He told the Polish broadcaster TVP that Urban’s face had been left “swollen and bloodied”.

“It was really clear that he fought,” Żurawski said.

A 23-year-old Pakistani asylum seeker was detained in the aftermath of the attack in the German capital.

However, German police later they had the wrong man and the person behind the massacre was still at large.