Authorities examine a truck Tuesday, December 20, that crashed into a crowded Christmas market in Berlin the night before. At least 12 people were killed and 48 injured in what police are investigating as a likely terrorist attack. TOBIAS SCHWARZ/AFP/Getty Images

Emergency responders tow the truck's cab away from the crash site on December 20. Ariel Zurawski, owner of the truck company, said the truck may have been hijacked as it was transporting 25 tons of steel. Sean Gallup/Getty Images

An overview of the crash site on December 20 shows where the tractor-trailer drove over the sidewalk and into market stalls near the Kaiser Wilhelm Memorial Church. Markus Schreiber/AP

A rescue worker stands beside Christmas decorations that were scattered by the crash. Sean Gallup/Getty Images

Members of the press crowd around the crash site on December 20. Markus Schreiber/AP

A rescue worker looks at destroyed market stalls near the truck's trailer. Markus Schreiber/AP

Authorities investigate the crash site on December 20. Michael Kappeler/AP

Emergency responders treat an injured person on Monday, December 19. Michael Sohn/AP

German police shine a flashlight onto the back of the truck. Sean Gallup/Getty Images

Emergency crews work near the crash site on December 19. JOHN MACDOUGALL/AFP/Getty Images

Police officers stand next to the truck. RAINER JENSEN/DPA/EPA

Ambulances are seen where the incident happened in western Berlin. Sean Gallup/Getty Images

Police stand beside the damaged truck that crashed into the market. Michael Sohn/AP

First responders load an injured person into an ambulance. Michael Sohn/AP

A Christmas tree lies next to the truck. ODD ANDERSEN/AFP/Getty Images

Police take someone into custody near the market. Moe Zoyari/Redux

Police stand guard at the market after the crash. Michael Sohn/AP