An escalator at a train station in Italy malfunctioned on Tuesday, reportedly leaving at least 20 people injured.
Fans were headed toward Rome's Olympic Stadium, where CSKA Moscow was scheduled to play AS Roma on Tuesday.
State television RAI broadcast a video of the incident that showed a packed escalator suddenly speed up, hurtling people down the stairs.
A photograph from the scene was posted on Twitter by the fire and rescue service.
One person was seriously hurt in the accident at the city-centre Repubblica station, they said.
Most of the injured are Russian, but a small number are Italian, according to the newspaper.
Witnesses quoted by police said the Russian fans had been singing and jumping before the escalator gave way.