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 oil facilities out of commission. No group has claimed responsibility for the attacks, which have exacerbated tensions between the central government in Baghdad and Kurdish authorities.

The Kurdish region`s anti-terrorism department said two drones attacked an oil field in the district of Zakho, causing damage but no injuries. DNO ASA, the Norwegian oil and gas company operating the field, said its operations were temporarily suspended following three explosions involving a small storage tank at Tawke and surface processing equipment at Peshkabir. It said there were no injuries, and a damage assessment was underway.

Hours later, the anti-terrorism department said the Baadre oil field, located in the Sheikhan district of Dohuk province, was targeted by a drone strike. There were no injuries. Videos showed a plume of smoke rising over barren hills. The attacks came a day after another oil field in Dohuk province operated by a US company was set ablaze, also after being struck by a drone.