CAIRO (Reuters) - Sudanese army chief General Abdel Fattah al-Burhan visited its strategic headquarters in central Khartoum on Sunday in his first appearance there since government forces claimed to have broken a months-long siege by the paramilitary Rapid Support Forces (RSF).

Burhan's forces are advancing in the capital and consolidating positions in the east, the troops of his rival, General Hemedti, are tightening pressure on El-Fasher, in Darfur, in the west.

The Sudanese army has broken a siege by the paramilitary Rapid Support Forces of its command centre in central Khartoum, the army said on Friday, in what would be a major victory in the capital after nearly two years of war.

The Sudanese army said Saturday that it gained full control of the al-Jaili oil refinery north of the capital Khartoum. The army made the announcement in a brief statement, without providing any further details.

The Sudanese army broke a paramilitary siege on one of its key Khartoum-area bases on Friday, paving the way to also freeing the besieged military headquarters, a military source said.