Renault SA has alerted French prosecutors to payments made to a Renault-Nissan business partner in Oman under former Chief Executive Carlos Ghosn, according to three sources.

This follows an internal investigation by the French carmaker after Ghosn's November arrest in Tokyo for suspected financial misconduct at alliance partner Nissan Motor Co.

Renault has established it paid out millions of euros described as dealer incentives to Omani distributor Suhail Bahwan Automobiles (SBA) over five years from around 2011, said the sources, who were briefed on the findings.