Ex-UFCer Melvin Guillard wanted after allegedly knocking man out in bar fight

An arrest warrant has been issued for former UFC fighter Melvin Guillard after he was allegedly involved in a bar fight in Denver earlier this week.

Surveillance footage posted by TMZ Sports on Friday shows someone resembling Guillard shoving a man and knocking another man to the floor, with the second man appearing to lose consciousness. The incident occurred Monday around 2 a.m., according to TMZ.

A spokesperson for the Denver Police Department told TMZ that several witnesses identified Guillard, 35, as the attacker.

Guillard, who appeared on "The Ultimate Fighter 2," posted a 12-9 record with one no-contest in 22 UFC fights before being released in 2014. He signed with the World Bare Knuckle Fighting Federation last month.