The Daily Mail says Let's Kick Racism Out and the FA have launched inquiries.
The Wales and Liverpool striker was allegedly the victim of 'inhuman, degrading and vile' taunts by rival fans.
The Football Association said it had been 'made aware' of the allegations by Let's Kick Racism Out and that it was now probing the claims.
Notorious bad boy Bellamy, 31, is a proud Welshman and a former captain of the national side.
It is alleged that the calls of 'sheep-sh***er' came from the terraces at Brighton and Hove Albion's ground during the crunch match on September 21.