NFF reported its suspicions to the police on Monday amid reports that players may have teamed with organized criminals to rig results for betting reasons.
Three of the players charged are from third-tier team Follo, which reported suspicions of match-rigging to NFF after a second-half collapse in its game against Østsiden saw the team shed a 3-0 lead in a match that ended 4-3 to the opposition.
Large bets were made on the game shortly before kickoff on June 24th.
Police arrested and charged the first Follo player on Wednesday, before releasing him from custody a day later. A second player was arrested after police became suspicious during questioning.
On Friday, police apprehended two more players, one from Follo and one from Asker.
Asker had reported its 7-1 defeat to Frigg, also on June 24th, as suspicious.
Both players arrested on Friday are suspected of taking payment in return for attempts to rig the results of the matches in question.
On Sunday, the association axed a second-division game between Ullensaker/Kisa and Ham Kam on Sunday over fears of outside interference aimed at fixing the result.
“NFF and the clubs want to assist the police to the best of our ability, which also means we are unable to comment on specifics relating to the case in light of the investigation,” said NFF president Yngve Hallén in a statement on Sunday.