Lazio fans could be heard chanting “this banana is for Bakayoko” before and after the match at Milan’s San Siro stadium, according to ANSA news agency and social media videos.
Bakayoko, who is a midfielder, is on loan from Premier League club Chelsea.
Thursday is Liberation day in Italy, a public holiday in which Italians celebrate the end of Nazi-fascism.
“The S.S. Lazio clearly distances itself from behaviors and manifestations that do not correspond in any way to the values of sport that this club promoted and supported for 119 years,” said the statement. “Lazio also rejects and disputes the simplistic tendency of some media to consider (all) Lazio supporters responsible for the actions carried out by a few isolated elements.”
“The club has always fought for legality and correct conduct.”
Neither Lega Serie A, Italy’s top football division, or the Italian Football Federation have commented on the incidents.
Bakayoko and teammate Franck Kessie had angered Lazio fans at the end of last week’s league match between the clubs when they paraded the shirt of Lazio defender Francesco Acerbi, who had spoken of what he believed was his team’s superiority before the match, in front of Milan fans.
Italian football has witnessed a number of high profile incidents of racist chanting inside stadiums in recent years.
At the time, Academic Alberto Testa, who spent time with Lazio and Roma ultras for the book “Football, Fascism and Fandom: The UltraS of Italian Football,”described the incident as a new low in the history of Italian football.”