A car has driven into a group of pedestrians close to Boston’s Logan airport, causing a number of casualties. At least nine people have been injured, the Boston Globe reported.

Pictures appeared to show that a Boston city taxi was the vehicle that struck pedestrians, leading to speculation that the incident may have been a tragic accident, rather than a terror attack. Witnesses report that injured people are being stretchered away from the scene.

The incident took place at the outdoor cafe near the airport’s taxi stand. Police have cordoned off the area. The driver, a 56-year-old man, remained on the scene after the crash and is being interviewed by police, Massachusetts State Police spokesman David Procopio told the Boston Globe.