Man who 'had contact with Berlin attacker' arrested - reports

A man who had contact with the Berlin attacker has been arrested, according to reports.

Prosecutors have said a 40-year-old Tunisian man has been detained, according to AFP. The man has not been named.

Last week suspected attacker Anis Amri, also Tunisian, was shot dead in Milan, days after the attack which left 12 people dead.

More on this as it develops.