The Yemeni army and popular committees launched a ballistic missile, branded Qaher 2, onto the gatherings of Saudi soldiers and the mercenaries in Al-Khadra exit in Najran, killing scores of them.
According to local sources, the operation followed a process of monitoring the movements and the gatherings.
The sources added that the Yemeni army and popular committees also launched shell and rocket barrages onto the Saudi posts to inflict heavy losses upon the Saudi soldiers and the mercenaries.
Yemen has been since March 26, 2015 under brutal aggression by Saudi-led coalition.
Thousands have been martyred and injured in the attack, with the vast majority of them are civilians.
Riyadh launched the attack on Yemen in a bid to restore power to fugitive ex-president Abd Rabbu Mansour Hadi who is a close ally to Saudi Arabia.