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German prosecutors have named their prime suspect in Monday's Berlin Christmas market attack as 24-year-old Tunisian national Anis Amri.

Amri's wallet was reportedly found in the bed of the truck that plowed into the market, leaving 12 dead and 48 injured.

ISIS has claimed involvement in the attack.

Ralf Jäger, the interior minister of North Rhine-Westphalia state, said Amri was previously known to have been in contact with radical Islamist groups. His request for asylum had been refused and deportation was attempted earlier this year on suspicion of "preparing a serious crime endangering national safety," Jäger added.

Police are offering a reward of up to 100,000 euros for any information on the suspect.

Amri reportedly has used six aliases and is considered armed and dangerous.

Watch the above segment from "Outnumbered" for more information on the suspect.

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