UPDATE: Die Welt reported Tuesday that Berlin Police said they arrested the wrong individual and the driver is still at large. (REPORT: Berlin Police: We Caught The Wrong Person, Attacker Still At Large)

A Monday report in the German newspaper Die Welt claimed the alleged driver of a truck that killed at least 12 in a Berlin Christmas market is a Pakistani refugee.

The report said that the alleged terrorist arrived in Germany in February 16, 2016. Die Welt did not list its sources. The alleged driver has been taken into custody. A Polish citizen found dead in the cab of the truck was the registered driver of the vehicle, which was reportedly stolen from a construction site.

The Islamic State has not claimed responsibility for the attack but in recent months they have encouraged followers to use vehicles as weapons. A July truck attack killed 87 in Nice, France.