Wilkshire left training just before the incident occurred but other players were hurt after being hit by shots.

Midfielder Alan Gatagov said a group of fans dressed in camouflage gear arrived at the club's training ground and unleashed a barrage of paintballs at the players and club staff.

"What are we supposed to do now?," he asked. "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 also hit."

Flyers were also thrown onto the pitch, some threatening the club's foreign players such as Wilkshire and demanding better performances.

The flyers read: "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."

The club has vowed to take serious action against those responsible for the attacks.

A statement on the club's website read: "We are convinced this was a planned and organised action. This is a challenge to the club and we will answer in the toughest possible manner.

"We intend to use all the resources available to us to find and hold the shooters accountable in any way the current law allows, including criminal prosecution."