Fulham have vowed to take the "strongest possible action" after striker Aboubakar Kamara was racially abused on social media following their 1-0 win over Huddersfield Saturday.
Kamara missed a 82nd-minute penalty with the game at 0-0, controversially seizing the ball from regular-taker Alexander Mitrovic, who would go on to score the winner.
Fulham boss Claudio Ranieri said he wanted to "kill" Kamara following the match, accusing the Frenchman of disrespecting the club by taking the spot-kick against his manager's orders.
"We are aware that numerous damaging and hurtful comments have been posted on Aboubakar Kamara's social media account, and as a club that prides itself on our respect and civility, we condemn anyone who may be associated with this repulsive activity," a club spokesperson told ESPN FC.
"This is not representative in the least of genuine Fulham supporters, many of whom have posted messages of support and encouragement to the player.
"The club will provide all necessary support to Aboubakar and will take the strongest possible action against those identified and responsible for these posts."
Kamara, 23, joined Fulham from French side SC Amiens in July 2017 and has scored two goals in 12 Premier League appearances this season.