Three Brighton fans are under investigation by Sussex Police following two separate incidents of racism at the club's Amex Stadium, reports BBC Sport.
The first incident involved two fans and took place at an Under-23 fixture against Tottenham on 27 September.
The second occurred during Saturday's win over Spurs, with one person arrested by police at the stadium.
Brighton chief executive Paul Barber condemned the behaviour and thanked fans who reported the incidents.
"It is very encouraging that in both incidents our stewards were alerted to this totally unacceptable behaviour by other Albion fans and, working with Sussex Police, our staff were able to take swift action, which hopefully will increase the chances of a conviction," Barber said.
