Police from Medicine Hat, Alta., are investigating the N.W.T. RCMP after a person was injured during drug den raids last Friday in Yellowknife.
Police say a member of the public sustained injuries during the execution of one of the search warrants.
Police seized guns, drugs, stolen goods, and $32,000 cash when they searched four homes and a storage locker on Friday.
The raids targeted a gang from B.C.'s lower mainland that has been selling crack cocaine and marijuana in Yellowknife.
Nine people are facing a total of 32 charges, including drug trafficking, possession of stolen goods, and firearms offences.
Police say the request for the investigation came from the RCMP and was not the result of a public complaint.