A car has crashed into a crowd at a Christmas market in east Germany, local media report.A least one person has been killed and several injured in the incident in Magdeburg, according to German public broadcaster MDR.The suspected driver of the car has also been arrested, MDR said, citing a government spokesman. Video on social media shows a number of people laying on the ground and emergency services in attendance. An “extensive police operation” is underway and the market was closed, according to local authorities.