The Cameroon Football Federation said on Friday it was investigating an incident of on-pitch violence during this week's 0-4 loss to Croatia at the World Cup and might impose sanctions against its players, dpa reported. Benoit Assou-Ekotto headbutted team-mate Benjamin Moukandjo after an argument, and striker Pierre Webo had to separate them. "The recent acts of violence that took place during the match against Croatia do NOT reflect the values of FAIR PLAY and RESPECT as promoted by our Federation, Staff and National Team as a group," the federation, known as FECAFOOT, wrote on its website. Coach Volker Finke had described the incident as a "shame." "As expressed by our coach during his press conference after the match, it is important that our team remains focused for its last game against Brazil," FECAFOOT added. "The mentioned disgraceful behaviour is being further investigated internally, and will be up for sanction if so judged by the mandated internal bodies," it wrote. The incident happened in the closing minutes of the match, as the players were showing signs of deep frustration. Cameroon also lost their first game 0-1 to Mexico and face Brazil on Monday to conclude a disappointing World Cup campaign. -- SPA 18:18 LOCAL TIME 15:18 GMT تغريد