MADRID, May 29 (Reuters) - Spain's anti-trust watchdog CNCsaid on Wednesday it is probing oil companies for possiblycolluding to hike fuel prices at the pump.
The investigation follows Spanish energy regulator CNE'saccusation earlier this month that oil majors Repsol,BP and Cepsa hiked fuel prices to protect their profitsduring a period of weak demand in Spain's prolonged recession.