Two trams in the French city of Strasbourg accidentally collided inside of the city's central railway station on Jan. 11

Two trams collided in a tunnel in France on Saturday, injuring at least twenty people, the authorities said. Five people are in critical condition according to an initial assessment, the French outlet Actu17 reported.

Two trams collided in a tunnel in the eastern French city of Strasbourg on Saturday, injuring at least twenty people, the authorities said.

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.

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