Taleb Al Abdulmohsen is in custody after driving his car into a Christmas market in the German city of Magdeburg Friday, killing five people, including a nine-year-old child and injuring over 200 others.

Musk, the billionaire Trump ally who is playing a public role in the incoming administration, posted in support Friday of Alternative for Germany, or AfD, after the German government collapsed this week.

Musk's intervention in German politics comes days after he met British lawmaker Nigel Farage at Trump's Mar-a-Lago resort in Florida to discuss bankrolling his right-wing populist Reform U.K. party with a reported $100 million donation — although details of any such arrangement have not been confirmed.