Six accused in a prescription drug ring were scheduled to appear in a Yorkton courtroom Monday. ((CBC))

More charges have been laid against an elected councillor with a Yorkton-area First Nation in connection with an alleged prescription drug trafficking ring.

On Monday, the RCMP said Gerald Michael Papequash, 52, of the Key First Nation, was arrested Feb. 3 and charged with possession for the purpose of trafficking a "large quantity" of the prescription drug hydromorphone, which is a narcotic.

He's also accused of identity theft and double doctoring, the RCMP said in a news release.

Papequash had been held in custody and was scheduled to appear in Yorkton provincial court on Monday morning, the RCMP said.

He and more than 20 other people in the area had already been charged last month with trafficking in a controlled substance and possession of property obtained by crime.

The accused are from Yorkton, Melville, Kamsack, Springside, Canora, Pelly and four Saskatchewan First Nations — Cote, Keeseekoose, Key and Little Bone.

There's also one accused from Manitoba. A warrant was issued last month for a 78-year-old man from Valley River First Nation.

Among those charged is Chief Clarence Papequash of the Key First Nation.

Six of the other people arrested in the alleged ring were also scheduled to appear in court Monday.

Police said the arrests followed a six-month investigation into the alleged illegal sale of prescription narcotics.

Ten others charged in the same case are to be in Yorkton court next week.