Israel Folau faces a showdown with Australian rugby chiefs after posting anti-gay views on social media.
In a statement, Rugby Australia described content within the post as "unacceptable" and said its integrity unit was looking into Folau's conduct.
The Wallabies star was warned last year, but avoided any disciplinary action, for making homophobic comments on his social media channels.
A message published on his Instagram account on Wednesday read that "hell awaits" for "drunks, homosexuals, adulterers, liars, fornicators, thieves, atheists, idolators."
Folau said on Instagram: "Those that are living in Sin will end up in Hell unless you repent. Jesus Christ loves you and is giving you time to turn away from your sin and come to him."
Rugby Australia responded in a statement, which read: "Rugby Australia is aware of a post made by Israel Folau on his Instagram account this afternoon.
"The content within the post is unacceptable. It does not represent the values of the sport and is disrespectful to members of the Rugby community.
"The Rugby Australia Integrity Unit has been engaged on the matter tonight."