England and Scotland have both escaped disciplinary action over an alleged scuffle in the Murrayfield tunnel ahead of last Saturday's Calcutta Cup.
Television cameras appeared to pick up a confrontation between the two sets of players as they returned to the changing rooms following their warm-ups.
Six Nations Rugby sought clarification from the Rugby Football Union (RFU) and Scottish Rugby Union (SRU) over what happened, while footage emerged on Monday showing England centre Owen Farrell clashing with Scotland No. 8 Ryan Wilson as he jogged into the tunnel.
It was widely reported that Farrell had been provoked but following an investigation, Six Nations Rugby found there was "no clear evidence of violent conduct or similar against any individual player."
Although no disciplinary action will be taken, the RFU and SRU will both be reminded of their "obligations to uphold the reputation of the tournament at all times."
"Six Nations Rugby gathered material from the RFU and SRU, as well as from the BBC and the match officials," a statement released by Six Nations Rugby read. "It also considered footage of the incident.
"It concluded that there was some evidence of pushing and shoving in the tunnel at the relevant time but no clear evidence of violent conduct or similar against any individual player.
"Accordingly, Six Nations Rugby will be writing to the SRU and the RFU to remind them and their respective players of their obligations to uphold the reputation of the tournament at all times, but no further disciplinary action will be taken. Six Nations Rugby will also remind all Unions of their and their players' obligations."
Speaking at a news conference on Wednesday, England coach Eddie Jones revealed he had discussed the matter with Farrell.
"I have definitely spoken to Owen but that's the end of the matter, it's done and dusted," Jones said.
"I have no reaction to the decision. We'll leave it to those people to decide those things, they've made their decision so it is obviously the correct decision."