The Saudi doctor who killed five people by ploughing his BMW into a Christmas market vowed to slaughter '20 Germans' last year.
A woman reported his online threat, made in Arabic, to Berlin police, as well as the German migration authorities. But no action was taken. Last night she said Al-Abdulmohsen 'openly threatened the lives of Germans but police didn't arrest him or take any action. This could have been prevented if the police had done their job properly.'
A police vehicle is stationed at the scene of a vehicle-ramming attack on the Christmas market on December 21 The Christmas market, where a car drove into a crowd on Friday evening, in Magdeburg, Germany, is empty on Saturday eveningDebris and empty stalls are seen on a closed Christmas market one day after a car-ramming attack in Magdeburg
Read MoreBREAKING NEWS Child aged just NINE is confirmed as one of five killed in Christmas market carnage: Major updates The boy was a member of the local youth fire brigade club. It posted: 'We are particularly saddened by the loss of such a young life from our own ranks.' People lay flowers at a makeshift memorial near the site of a car-ramming attack on a Christmas market in Magdeburg
Read More Saudis 'tipped off Germany about Xmas market suspect' who was 'ready to die' and 'had taken drugs' But Professor Neumann said that the claims could be part of a Saudi disinformation campaign, as Al-Abdulmohsen was a staunch critic of the country's rulers.