Nottingham Forest fans are under investigation after complaints of chanting considered to be homophobic during their defeat at Chelsea.
Forest fans taunted their hosts with loud cries of 'Chelsea rent boys' during the first half and at the end of the FA Cup third round tie.
One Chelsea supporter was fined nearly £1,000 and banned from football for three years for aiming homophobic abuse to a Brighton fan during a game last month.
A spokesman for anti-discrimination campaign group Kick It Out said: 'We have received reports of alleged homophobic chanting by Nottingham Forest supporters at Chelsea during today's FA Cup fixture.
'We have passed those onto the FA and offered our support in any possible investigation.'
Nottingham Forest are aware of the complaints.
Chelsea won the match 2-0 with Alvaro Morata scoring both goals.
