SOFIA, April 26 (Reuters) - Bulgaria's competition regulatorsaid on Tuesday it had raided the offices of fuel retailersPetrol and Nis Petrol, which is controlled by Russia'sGazprom Neft, as part of its investigation intopossible cartel agreements.
Bulgarians complain of high fuel costs despite a plunge inglobal oil prices and Prime Minister Boiko Borisov has calledfor the competition authority to speed up its investigation.
The Commission for Protection of Competition said in astatement its staff were carrying out a spot inspection at theoffices of Petrol and Nis Petrol.
The companies were not immediately available for comment.
In February the watchdog opened an inquiry covering sevenfuel retailers over possible price-fixing and into Lukoil's Bulgarian oil refinery for possible abuse of itsdominant market position.
The commission raided the Bulgarian offices of the localsubsidiary of Austrian oil group
The Bulgarian Petrol and Gas Association, which representsall the companies being investigated, has said there are nocartel agreements between any of its members. (Reporting by Angel Krasimirov; Editing by Alexander Smith)