"It is still not yet clear if there was any damage" in the attack on the Khor Mor complex, said Ramak Ramadan, district chief of Chamchamal where the facility is located.

In June, the site owned by UAE energy company Dana Gas was targeted three separate times by rockets that did not cause casualties or damage.

No none has claimed responsibility for the attacks.

The gas field lies between the cities of Kirkuk and Sulaimaniyah, in a region administered by Kurdish authorities.

Rockets also struck the Kawergost refinery in Kurdistan in April and May.

The assaults have come amid a simmering oil dispute between Kurdistan and the federal government in Baghdad.