Dynamo Moscow players were attacked with paintball guns by a group of disgruntled supporters as the team trained in Novogorsk on Friday, according to R-Sport.
The club have opened their Russian Premier League campaign with eight defeats in 11 matches, with fans subsequently calling for drastic changes. The 11-time Russian champions are experiencing their worst ever start to a season, lying in the relegation play-off zone in 13th place.
Following the attack, Dynamo midfielder Alan Gatagov claimed he was considering legal action after being hit by one of the shots fired at the squad. Gatagov insists "lots of players were hit" and remains stunned by the behaviour of the supporters.
"Words fail me," he told R-Sport. "What should we do? Should each of us hire a personal bodyguard? I was hit in the back of the head when they shot at us, lots of players were hit.
"I didn't even realise what they were shooting with, perhaps paintballs, they were in camouflage and fled pretty quickly. It was vile. Fans should support us, not do this type of thing.
"I'm still in shock. I have a small child at home, we've all got families. What if someone got seriously hurt? What would happen then? I will take advice from some people and decide whether to seek prosecution, because this was an attack."
The players allegedly received a threat last month, with flares being let off outside the training facility and fans leaving a message saying: "If the club and the coaches can't motivate you, then believe us, we will do it. We are the supporters and the fans. And our methods will be a little more serious."