No group has claimed responsibility, but the attacks have heightened tensions between Baghdad and Kurdish authorities, raising concerns about the region’s energy security.

Oil prices rose $1 on Thursday after drones struck Iraqi Kurdistan oil fields for a fourth day, pointing to continued risk in the volatile region.

The US on Wednesday condemned drone attacks on oil fields in the Iraqi Kurdish region. "The United States strongly condemns the drone attacks that have been targeting oil fields in the Iraqi Kurdistan Region since July 14,