ROXBURY, N.H. (MyKeeneNow) A month-long investigation into cocaine and crack cocaine sales in Roxbury has led to four arrests, with state police confirming that additional suspects are still being sought.

Troopers with the New Hampshire State Police Narcotics Investigations Unit executed a search warrant at 138 Branch Road on Sept. 10, where they took three people into custody. Arrested were Tyjuan Gary, 32, of West Orange, N.J., and Michael Steever, 45, of Claremont, both charged with felony sale of a controlled drug. Also arrested was 35-year-old Tianna Martin of Surry, who faces a felony conspiracy charge.

Another man tied to the case, 37-year-old Shawn Mooney of Roxbury, was not at the residence when police arrived. Mooney, wanted on a separate warrant for failing to register as a sex offender, was later located and arrested by Lebanon police the same day.

Authorities say warrants remain outstanding for other individuals connected to the investigation.

Gary and Steever were arraigned Sept. 11 in Keene District Court, while Mooney appeared in Lebanon District Court that same day. Martin was released on personal recognizance following her arrest.

State police credited assistance from troopers assigned to Troop C as well as officers from Roxbury and Keene police departments.

Anyone with information about the case is urged to contact Lt. Shane W. Larkin of the Narcotics Investigations Unit at (603) 234-0707, or submit an anonymous tip via email to nabdope@dos.nh.gov.