The Houthi warriors had complete control of the Kassara area and made strides on the western frontlines despite air attacks.
Yemen’s Houthi rebels achieved major victories in the government’s fight for the last northern stronghold, approaching the center of Marib city despite heavy casualties, military sources said masonry.
The rebels have regained full control of the battlefield northwest of Kassara and made progress on the western front in spite of Saudi-led coalition airstrikes supporting the Yemen government.
The Marib and the oil fields around it form the last important territory held by the government in the north, with the rest under the control of rebels, including the capital Sanaa.
The fierce fighting has killed at least 65 people in just the past two days, including about 26 loyal employees, four of whom are officers, government sources told AFP news agency.
Iran-linked Houthis rarely reveal their own losses.
With the Houthis taking control of Kassara front, the fight moved to the Al-Mil area, 6km (4 miles) away from the center of Marib and the population center, they say.
However, the mountains around Al-Mil remain a formidable barrier to the rebels who launched their campaign to attack the city of Marib in February.
Government sources said the Houthis poured hundreds of reinforcements in recent days to gain profits, using motorcycles after the coalition had targeted their military vehicles.
The loss of Marib would be a big blow for the internationally recognized Yemen government and for Saudi Arabia, which has given them military support since March 2015 after rebels captured Sanaa.
About 140 camps have sprung up in the surrounding desert to provide basic shelter for the two million displaced people, according to the Yemen government.
According to the United Nations refugee agency, the escalation in hostilities has displaced 13,600 people in the Marib this year, putting heavy strain on the city during the second coronavirus.
Lack of clean water and electricity, makeshift settlements are inundated, and camp residents say they have suffered many Houthi shelling.
Rebels have also ramped up missile and drone attacks against neighboring Saudi Arabia in recent months, demanding the opening of Yemen’s airspace and ports. They declined one Saudi Arabia’s proposal for a ceasefire.
On Sunday, Houthis said it had attacked and attacked King Khalid air base at Khamis Mushait with a drone in southern Saudi Arabia, but the coalition led by Saudi Arabia said it had intercepted and destroy it.
The US administration of President Joe Biden is ramping up a new effort to end the catastrophic conflict, warning that suffering will only end when a political solution is found.