There as hardly been any news about this attack that happened just a couple of days prior to OP's attack.
German lorry attack in Limburg seen as 'act of terrorism'
https://www.bbc.co.uk/news/world-europe-49970807
German lorry attack in Limburg seen as 'act of terrorism'
https://www.bbc.co.uk/news/world-europe-49970807
An attack on motorists in the western town of Limburg is being investigated as terrorism, security sources have told German media.
On Monday, a man hijacked a lorry and ploughed into eight vehicles waiting at a traffic light, injuring eight people. Seven were treated in hospital.