Two trams collided in Strasbourg in eastern France on Saturday, causing dozens of injuries, though none critical, authorities said.

Social media footage, verified and geolocated by CNN, shows the aftermath of a collision between two trams in Strasbourg, France. The accident took place in a tunnel near the Strasbourg central train station,

The exact cause of the collision was unclear but local media reported that one of the trams was reversing at the time. Mayor Jeanne Barseghian, who visited the site, described the incident as a “brutal collision” and expressed her gratitude to emergency responders.