“During a delivery to the restaurant Caliente someone jumped into the driver’s cabin and drove off with the car, while the driver unloads,” communication director Mårten Lyth told the media. There were also reports of gunshots on the scene, though this has not been verified by authorities. Part of central Stockholm was cordoned off and the area was evacuated. Large numbers of police and emergency services were at the scene. Subway traffic has been shut down in the area. At least one person has been arrested, according to Prime Minister Stefan Lofven. “Sweden has been attacked. This indicates that it is an act of terror,” he said. The Prime Minister returned to the capital from the country’s west. Facebook activated safety check for Stockholm.Several attacks in which trucks or cars have driven into crowds have taken place in Europe in the past year. Al Qaeda in 2010 urged its followers to use trucks as a weapon.