Speaking to the Official Club Website, the former Guinea international explained: "I was training with the first-team when I felt something in my hamstring and had to pull out.
"I've had a few days rest now and will see a specialist this week and take it from there. Hopefully it's not too bad but I'll get some advice from the specialist and see what he says.
"t's very frustrating because I was training with the first-team and hoping to play in the reserves this week but that's not possible now.
"I don't know how long I will be out for. It will be down to what the specialist says but I will be the happiest man around when I can get back to playing football and helping the team try to win promotion."