Yemen's Houthi group issued video footage on Saturday purportedly of an incursion by its fighters into a Saudi Arabian border area on the frontlines in which Houthi-run media said Saudi soldiers were captured and killed.

The spokesman for the Saudi-led coalition which has been battling the Iran-aligned Houthi group for over six years did not immediately respond to a request for comment.

Houthi-run Al Masirah television on Twitter cited a military source as saying more than 80 Saudi soldiers and Sudanese "mercenaries" were killed or injured, while tens were captured in the operation in the vicinity of Al Khoubah in the southern Saudi region of Jazan.

If confirmed, the attack would further complicate attempts by the United Nations and the United States to establish a ceasefire in a conflict widely seen in the region as a proxy war between rivals Saudi Arabia and Iran.