Berlin police
Berlin policeReuters

Germany has issued a 100,000 Euro ($105,000) reward for information which would lead to the capture the main suspect in Monday's terrorist attack.

The terrorist drove a truck into a crowded Christmas market, killing 12 people and injuring 48, including an Israeli citizen. The ISIS terrorist organisation claimed responsibility for the attack.

The suspected attacker was revealed to have been under surveillance for months prior to the attack, He had used as many as six different aliases.

Authorities have initiated a Europe-wide manhunt for the suspect, Tunisian citizen Anis Amri.

The interior minister of North Rhine-Westphalia state, Ralf Jaeger, said of Amri: "Security agencies exchanged information about this person in the joint counter-terrorism centre, the last time was in November."

He also stated that Germany had rejected Amri's request for asylum in July. He was not deported because Tunisia initially refused to take him back.

German authorities warned citizens not to approach Amri because he is believed to be armed and dangerous.