Three people including the nephew of the Berlin Christmas market attacker Anis Amri have been arrested in Tunisia.
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.
Twelve people were killed and dozens more injured in the attack on Monday.
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 funeral for the lorry driver killed in the Berlin Christmas market attack has taken place in his home country of Poland.
Footage has emerged of the final moment before a truck ploughed into a crowd of people at a Christmas market in Berlin.
A man is being hunted by German police after a lorry ploughed into a Berlin Christmas market on Monday, killing 12, but who is the suspect?