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Live updates: Latest on the Berlin attack investigation

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.

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Wanted man armed, dangerous and uses multiple aliases

The European arrest warrant lists six different names Anis Amri has adopted. Credit: AP

A European arrest warrant for a Tunisian suspect in the lorry attack on Berlin's Christmas markets has said he uses multiple identities and should be considered armed and dangerous.

German authorities hunting Anis Amri in Germany and across Europe's border-free travel zone said he has adopted six different names under three different nationalities.

It names the suepect as having Tunisian citizenship after being born in the town of Ghaza. But it lists multiple aliases, many of them variations on his name, and claims he has adopted Egyptian and Lebanese citizenship too.

Investigators are hunting the suspect in Germany and across Europe's border-free travel zone. Credit: Reuters

The wanted man was considered part of the "Salafist-Islamist scene" by authorities, though authorities have added caution about his suspected role in Monday's attack.

Interior Minister Thomas de Maiziere said "this is a suspect, not necessarily the perpetrator. We are still investigating in all directions".

Germany's chief federal prosecutor told politicians "this Tunisian is a solid lead, his wallet was found in the cab of the truck, but that it's not clear that he was also the perpetrator".

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