Knoxville, TN (WOKI) Knoxville police arrest four Thursday in a Marble City drug operation.

Knoxville Police Department officials say 60 year-old Asa Hobbs, 63 year-old Joseph Simpson, 67 year-old David Haynes, and 34 year-old Rachel Newman, all from Knoxville, were arrested by the Organized Crime Unit.

As part of the operation, two of the suspects homes were searched leading police to discover a handgun and drugs to include heroin, meth, and pills. Police also report that Haynes and Newman had outstanding warrants.

Officials say the investigation was spurred after receiving numerous complaints of suspected drug sales in the area.

Organized Crime Unit investigations are still ongoing, according to police.