A driver who rammed a car into a crowded Christmas market in the German city of Magdeburg, killing at least five people and injuring more than 200, has been identified by authorities as a 50-year-old Saudi Arabian citizen who had lived in Germany for more than a decade and worked as a doctor.

Germany is in mourning after a driver rammed through a crowd with their car in the eastern German city of Magdeburg as it held Christmas markets. Here's what we know.