Unknown gunmen carried out an attack and blew up a major crude oil pipeline in the country's southeastern province of Shabwa on Monday evening, a government official said . 

The blast was directed at the pipeline responsible for transporting crude oil from the Jannah Hunt oil field in the Usaylan district, the source said on condition of anonymity. This pipeline stretches to the Nushima export port located on the Arabian Sea in Shabwa.

He clarified that the sabotage attack caused significant damage to the pipeline, leading to towering flames and thick plumes of smoke in the area.

The attack on the pipeline occurred following the withdrawal of military personnel, who abandoned their posts in securing the pipeline due to grievances over unpaid salaries from the government, according to the official.

Yemen's crude oil export operations have been severely disrupted due to the ongoing conflict between the Yemeni government and the Houthi group.

The nine-year-long conflict has not only destabilized the nation but has also fostered the rise of armed gangs and extremist groups across Yemen, further complicating the security landscape.

The recent pipeline attacks only exacerbate an already dire situation, further undermining the country's infrastructure and economic stability.