Manchester United supporters threw tennis balls onto the pitch at Old Trafford during the club's match against Roma, in what appeared to be a deliberate attempt by fans to disrupt the game.
The incident drew immediate attention, with objects visibly landing on the playing surface as the match was under way. The throwing of tennis balls onto the pitch is a tactic that has previously been associated with organised fan protests at football grounds.
Old Trafford was the scene of the disruption, with United supporters directing their frustration in a manner that risked interfering with the contest against the Italian side Roma.
