Inter Milan goalkeeper Andre Onana has quit Cameroon's World Cup squad.

Onana was dropped for today's 3-3 draw with Serbia ahead of walking out on the squad.

Cameroon later announced Onana had been axed for "disciplinary" issues. However, it's since emerged the axing was decided after a row between the goalkeeper and coach Rigobert Song.

Cameroon Federation president Samuel Etoó attempted to mediate between the two, but Onana was determined to leave.

According to Fabrizio Romano, the reason for the original omission was a dispute between Onana and Song about how the goalkeeper plays. Song wanted a more conservative way of playing from his goalkeeper - which Onana rejected.