FIFA has confirmed an investigation involving Javier Mascherano will take place, after the Argentina skipper was sent off for kicking the driver of a medical cart in a World Cup qualifier against Ecuador.
The incident occured in Quito on Tuesday, with Paraguayan referee Enrique Caceres issuing a red card as Mascherano lashed at and shouted at the driver who was taking him off the pitch injured.
"We are able to confirm that we have opened proceedings against Mascherano but as usual we will not comment further because the case is ongoing," FIFA told Reuters.
Mascherano later wrote on Twitter: "I really apologise for the reaction I had, nothing justifies this".
Argentina were held to a 1-1 draw in the match as Sergio Aguero's early penalty was cancelled out by a Segundo Castillo equaliser, keeping them on top of the South American World Cup qualifying group on 26 points.