German police arrested a Saudi Arabian man after a deadly car-ramming attack on a Christmas market Friday in which an SUV barrelled through a crowd of revellers at high speed, leaving a trail of bloody carnage.

At least two people were killed, one of them a young child, and 68 injured, said authorities in the city of Magdeburg, located about 130 kilometres (80 miles) southwest of Berlin.

The suspect was a 50-year-old medical doctor from Saudi Arabia living in the eastern state of Saxony-Anhalt, said regional premier Reiner Haseloff, speaking at a scene cordoned off and guarded by police commandos. "We have arrested the perpetrator, a man from Saudi Arabia, a doctor who has been in Germany since 2006," he told reporters, calling the attack a "catastrophe" for the city and the country. "From what we currently know he was a lone attacker so we don't think there is any further danger."

German media partially named the suspect as Taleb A. and said he was a doctor of psychiatry.

The black BMW barrelled through the crowd at high speed just after 7:00 pm local time (1800 GMT) when the market was filled with revellers.

Police said the vehicle drove "at least 400 metres across the Christmas market" leaving a trail of bloodied casualties, debris and broken glass at the city's central town hall square. Ambulances and fire engines rushed to the chaotic site, which was doused in blue police lights and wailing sirens, as badly injured people were treated on site and rushed off to hospitals.

German President Frank-Walter Steinmeier wrote that "the anticipation of a peaceful Christmas was suddenly interrupted" in the attack but he cautioned that "the background to the terrible deed has yet been clarified". The leader of the far-right Alternative for Germany (AfD), Alice Weidel, which has focused on jihadist attacks in its campaign against immigrants, wrote on X "when will this madness stop?" The Saudi government expressed "solidarity with the German people and the families of the victims", in a statement on social media platform X, and "affirmed its rejection of violence". French President Emmanuel Macron said he was "profoundly shocked" by the attack and that he "shares the pain of the German people". Italian Prime Minister Giorgia Meloni also condemned the "brutal attack on the defenceless crowd" and Spain's prime minister Pedro Sanchez voiced his sorrow at the "terrible attack".