(CNN) — A gas pipeline fire in eastern Saudi Arabia killed 40 workers, 34 of them foreign, and injured nine others, the state oil conglomerate Saudi Aramco said Tuesday.

The dead included five Saudi employees and one contractor, and 34 contractors from outside Saudi Arabia.

The list of foreign nationals included 18 Pakistanis, seven Bangladeshis, seven Indians, one South African and one Nepali, the company said.

The pipeline is about 18 miles (30 km) from the Hawiyah Gas Plant.

The fire broke out "where maintenance work for new tie-ins was being conducted" by a contractor for the company on the Haradh-Uthmaniyah gas pipeline, Saudi Aramco said.