British singer James Arthur has shocked fans by posting pictures of his injuries following an alleged "bar brawl" in Poland.

The U.K. X Factor winner took to Instagram.com on Monday night (23Jun14) to post a snap showing a cut near his left eye and a swollen lip. He added the caption, "Polish bar brawls are the best."

Concerned fans flooded his Twitter.com page with messages of concern, but the singer brushed them off, replying: "Don't worry I'm absolutely fine and in good health just a couple bumps and scratches in a scuffle. Boys will be boys."

Arthur was in Poland to perform at the first annual Wromantic Music Festival in Wroclaw on Sunday (22Jun14).