The mother of a nine-year-old boy killed in the German Christmas market attack has paid tribute to 'my little teddy bear'.Andre Gleissner was one of at least five people who died, while more than 200 others were injured when a car ploughed into crowds in Magdeburg on Friday evening.German Christmas market attack - latest updatesHis mother Desiree Gleissner said in a post on Facebook: 'Let my little teddy bear fly around the world again... Andre didn't do anything to anyone... He was only with us on earth for nine years... why you... why. I don't understand.'Now you are with grandma