The Football Association has reportedly asked Swansea City and Leicester City to explain their versions of the post-match incident between Ashley Williams and Riyad Mahrez.
Both players, who escaped a yellow card during last weekend's match at the Liberty Stadium, had to be separated after confronting one another in the tunnel after the Foxes' 3-0 victory.
It is believed that Williams later tried to find Mahrez as the Leicester player, who scored all three of his side's goals, boarded the team bus.
According to ITV News, the FA has given both clubs until the end of the week to submit their accounts of the incident.
The result put Swansea one point above the relegation zone in the Premier League, while Leicester have a two-point lead at the top.
