ROCKLAND, Maine — Five Knox County residents were arrested Monday night as part of an investigation into the importation and sale of oxycodone pills.

Police conducted a series of searches and seized 162 oxycodone pills, 16 Klonopin pills, eight Suboxone strips, six Suboxone pills, hypodermic needles and more than $5,000 cash, according to a news release issued Tuesday by the Maine Drug Enforcement Agency. The oxycodone pills were being sold locally for $50 to $60 each, MDEA Supervisor James Pease said in the release.

Members of the group had been traveling weekly to New Bedford and transporting hundreds of pills back to Knox County, Pease said.

Kathleen Zable, Kevin Richards, Jason Walsh, Duane Natale, all of South Thomaston, and Karrie Prior of Friendship were arrested.

Zable, 24, was charged with Class B trafficking in oxycodone. Her bail was set at $500 cash, and she has a court date of Dec. 14.

Richards, 25, was charged with Class D possession of Suboxone and violation of probation. Bail was set on the possession charge at $1,000 unsecured. He is still being held at the Knox County Jail on the probation violation.

Walsh, 33, was charged with Class B trafficking in oxycodone. His bail was set at $500 cash, and he has a court date of Dec. 14.

Prior, 24, was charged with Class D falsifying physical evidence and violation of probation. Her bail on the falsifying physical evidence was set at $750 unsecured. She is still being held at the Knox County Jail on the probation violation.

Natale, 37, was charged with Class C possession of oxycodone. His bail was set at $1,000 with a court date of Dec. 14.

Class B and C crimes are felonies punishable by up to 10 and five years in prison, respectively. A Class D crime is a misdemeanor with a maximum penalty of 364 days incarceration.

Agents with the Maine Drug Enforcement Agency and members of the Knox County Sheriff’s Office, Maine State Police and Thomaston were involved in the searches and arrests Monday night.

Richards’ house on Quarry Lane and Natale’s house on Dublin Road, both in South Thomaston, were searched, according to the MDEA. Richards and Natale were arrested at their homes. Walsh and Zable were arrested after deputies stopped a car in South Thomaston, and Thomaston police stopped another car in Thomaston that had several people in it, including Prior, who was taken into custody. The arrests took place between 5 p.m. and 9 p.m. Monday.