A massive international manhunt is underway for the man seen as the primary suspect in Monday's terror attack in Berlin.
12 people died and more than 50 were injured after a truck was driven through a Christmas market in the centre of the German capital.
Islamic State have claimed responsibility for the attack, and police are hunting a man reportedly of Tunisian origin.
Tunisian officials have identified the man as 24-year-old Anis Amri, although investigators suggest he has gone by a number of identities.
Police in Germany had been watching the young man for months covertly, after having received a tip he may have been planning to buy automatic guns, but eventually stopped watching after finding no evidence to support the claim.
A €100,000 (£84,000) reward has been offered for anyone with information that could lead to his arrest.