By Ahmed Rasheed BAGHDAD (Reuters) -Drones struck oilfields in Iraqi Kurdistan on Thursday, with officials pointing to Iran-backed militias as the likely source of attacks this week that have slashed the region's oil output by more than half.

West Texas Intermediate (WTI) Oil price extends its gains for the second successive day, trading around $66.40 per barrel during the Asian hours on Friday. Crude Oil prices receive support from concerns over supply risks.

Drones targeted oil fields in Iraq’s semi-autonomous northern Kurdish region Wednesday, the latest in a series of attacks in recent days that have put several o