Paul Kelly, who competed in the UFC as recently as last year, was one of three men arrested Monday for allegedly conspiring to supply Class A and B drugs, the Liverpool Echo reported.
Several locations owned by several individuals were raided, with cannabis plants, firearms ammunition and money being found. Heroin is also believed to have been found.
Kelly left the UFC after a loss to Donald Cerrone at UFC 126 in 2011. He competed for Super Fight League last month, falling to Ryan Healy in India. The 27-year-old has a career record of 12-5, including five victories inside the Octagon.