Crusaders wing Zac Guildford has voluntarily stood down from involvement with the Crusaders after a late-night incident at a residential home in Christchurch last weekend.
Guildford, 23, has admitted being involved in the incident after attending a private house party.
He informed Crusaders coach Todd Blackadder during the week and chose to remove himself from the team environment while the matter is considered by the New Zealand Rugby Union (NZRU) and the Crusaders.
"We and the Crusaders were very disappointed to learn of this incident. As a result, the NZRU has initiated misconduct proceedings against Zac," said NZRU Chief Executive Steve Tew.
"We will be meeting with Zac and his representative in the following week to discuss the matter, and next steps.
"As his employer, we want to ensure that the process respects Zac's right to a fair hearing so we do not wish to comment further at this stage."