Airdrieonians defender Rico Quitongo has claimed he was racially abused by one of the club's supporters during Saturday's 0-0 draw with Queen's Park.
Airdrieonians confirmed on Wednesday they are conducting an investigation into the alleged racist remarks.
The 22-year-old Quitongo wrote on Twitter on Tuesday night: "Can't believe I'm actually writing this but here goes...Saturday at my football game away to Queen's Park I was subjected to racial abuse by one of my own Airdrie supporters," he said in a Twitter post on Tuesday.
"Now as I'm not surprised with this still in football I am more hugely disappointed to hear it from where a section where my family would normally be sitting.
"Thankfully, my family weren't there but it makes no difference, it shouldn't be in football and I absolutely don't deserve to be personally abused for my skin colour.
"I'm all for banter with fans etc, but I will not tolerate it whatsoever.
"I am proud to be black and proud to be who I am.
"I may not be the best footballer for fans, but I shouldn't be singled out period.
"The club have a pending investigation and are supporting me as much as they can, but you can't always catch these idiots that make these remarks, which upsets me.
"This is not a cry for sympathy, as it's the last thing I'd want, but more needs to done for cowards to change."
Airdrieonians released a statement which said: "Following a social media post made by a current member of the Airdrieonians squad, we can confirm that the club are conducting an investigation into alleged racist remarks made by a supporter.
"As a club, Airdrieonians will not tolerate racism. Any individual using racist language is not welcome at Airdrieonians FC and will face a lifetime ban from attending matches.
"Anyone who witnessed or heard the incident during the match against Queen's Park last Saturday should contact the club in the strictest of confidence.
"Rico Quitongo has the full support of everyone at the club. Many of our supporters have contacted the club directly expressing their support and respect for Rico.
"Pending the results of the investigation, the club will be making no further comment."
Kick It Out reporting racism
Kick It Out is football's equality and inclusion organisation - working throughout the football, educational and community sectors to challenge discrimination, encourage inclusive practices and campaign for positive change.