As the search for Berlin Christmas market attack has narrowed to the Tunisian born Anis Amri, it has been learn that that the suspect had recently offered himself up as an ISIS suicide bomber and took a sinister video of himself walking the streets of Berlin.

He was learning to make bombs and was barred from visiting US due to his links with ISIS as revealed by US Officials.

Amri, a man with six aliases  and three fake passports, also has an array different Facebook accounts including one where his profile picture was a lion - a key motif used by jihadists to symbolise honour.

It contains a single video of him filming himself in the centre of Berlin in September - with German media claiming it could have been a reconnaissance video.