The Tunisian man suspected of carrying out the Berlin Christmas market truck attack moved around like a "lone wolf" while travelling through Italy, the country's interior minister said.
Marco Minniti's comments backed Italian investigators' findings which have indicated that 24-year-old Anis Amri lacked significant contacts in Italy, as he fled Germany after the December 19 attack which left 12 dead.
Mr Minniti said, "from when he arrived in Italy, Amri moved like a lone wolf" while he was fleeing from authorities.
Amri died in a shoot-out with Italian police in Milan on December 23.
The funeral for the lorry driver killed in the Berlin Christmas market attack has taken place in his home country of Poland.Read the full story ›
A Tunisian man who was detained in connection with the Berlin truck attack has been released by German police.
The 40-year-old man was released after police determined he wasn't in contact with Anis Amri regarding the attack on a Christmas market in Berlin on 19 December.
Police detained the man on Wednesday in connection with a telephone number saved in Amri's mobile phone.
Amri was being investigated for benefit fraud after claiming, officials have now revealed.
He was suspected of simultaneously claiming benefits in two towns in Germany under different identities.
The investigation was opened in April, but closed in November as Amri's whereabouts were unknown.
A Tunisian man who may have been involved in last week's attack on a Berlin Christmas market has been detained by German police.
The suspected attacker, Anis Amri, a rejected asylum seeker from Tunisia, had the mobile phone number of the 40-year old Tunisian, whom they did not name, stored in his telephone, prosecutors said.
Police raided his home and business premises.
"Further investigations indicated that he could have been involved in the attack," said prosecutors, adding that he was arrested.
"To what extent suspicions against the arrested person will be hardened up remains to be seen after further investigation," said the prosecutors, adding they would decide by the end of Thursday whether to issue an arrest warrant for him.
The Tunisian national suspected of carrying out the truck attack that killed 12 people in a Berlin Christmas market appears to have passed through Lyon in France as he fled to Italy, a French judicial source has said.
Video surveillance footage showed Anis Amri at the Lyon-Part-Dieu train station on Thursday, where officials believe he bought a ticket for Chambery, between Lyon and the Italian border.
Amri was shot dead near Milan in Italy in the early hours of Friday after he pulled a gun on police who had asked for his identification papers.
French officials are investigating how the suspect arrived in Lyon after the December 19 attack in Berlin, which has been claimed by the so-called Islamic State.
ITV News reporter Olivia Kinsley has the latest on the ongoing investigation into the Berlin lorry attacker after it expanded to four countries across two continents.
A day after Anis Amri was shot dead in Italy, police in Tunisia arrested his nephew and two others suspected of belonging to the same terror network.
It came as the body of an Italian woman killed in Monday's lorry attack on a Christmas market was returned to Rome.
The body of an Italian woman killed in the truck attack on a Christmas market in Berlin has arrived in Rome.
A casket containing the remains of Fabrizia di Lorenzo, 31, arrived at Rome's Ciampino airport on Saturday five days after she was killed along with 11 others in the attack.
Italian President Sergio Mattarella was present as Ms Di Lorenzo's body arrived in the Italian capital.
The victim had been living in Berlin and went to the Christmas market to buy presents to celebrate the holiday with family in her hometown of Sulmona, central Italy.
The suspected attacker, Tunisian national Anis Amri, was killed in a shootout on Friday in a Milan suburb.
The nephew of the Berlin Christmas market attacker Anis Amri has been arrested in Tunisia, officials said.
Tunisia's Interior Ministry said Amri - who was shot dead on Friday - had sent his 18-year-old nephew Fedi money to join him in Europe.
Two other people were also arrested.
It is unclear whether the suspects helped Amri flee Berlin.
The nephew was arrested in Amri's hometown of Oueslatia while the others were arrested in Tunis. All three were detained on Saturday.
- Video report by ITV News Security Editor Rohit Kachroo
The mother of Berlin attack suspect Anis Amri has said she fears the world will now never know why he allegedly drove a lorry through a crowd.
Nour El Houda Hassani said "they killed my son with all his secrets."
Speaking in his Tunisian hometown of Oueslatia, she begged for his remains to be brought home "I want to know the truth of my son, I want to know who was behind him, I want to know who brainwashed him."
Amri was shot by Milan police on Friday after his identity papers and fingerprints were found on the truck used in Monday's attack, which killed 12 and injured dozens.
The Islamic State group released a video in which Amri pledged allegiance to the extremists.
The policeman who was shot during the firefight with Anis Amri has been pictured speaking from his hospital bed.
Cristian Movio has been widely praised from officials in both Germany and Italy after helping apprehend Anis Amri in Milan on Friday.
Movio and his colleague Luca Scata had spotted Amri acting suspiciously near a train station in Sesto San Giovanni when they came under fire.
Amri was shot dead by Scata a short while later.