The Yemeni forces backed by the popular resistance thwarted an attempt by the Houthi militants to infiltrate into the province of Dhali, local sources said.
The sources affirmed that fierce battles broke out early Thursday in the town of Qatabah on the border with the province of Ibb after two Houthi convoys were trying to enter Dhali.
Around a dozen of fighters from both sides were killed in the battles, they said, adding that the Houthis retreated to Ibb.
Recently, the Houthis have attempted to infiltrate into southern cities including Abyan which were retaken from them in recent months.
Dhali was the first southern city retaken.
So far, the Saudi-led coalition, which has been bombing the Houthis since March, helped the national forces to drive the militants out of most of the southern regions.
In the meanwhile, well-informed sources said clashes between the Yemeni forces and Sudanese troops broke out late on Wednesday at Aden Airport.
Six Sudanese and two Yemeni troops were killed in the battles that erupted after Sudanese troops spread at the airport, according to the sources.
Hundreds of Sudanese troops have lately arrived in Aden and more are yet to deploy in support of the Arab coalition.
In Taiz, sources within the popular resistance said the national forces and resistance retook key positions from the Houthis today.
In addition, the Saudi-led coalition bombed Houthi forces at Taiz University, the district of Salah and other parts helping the Yemeni forces and the popular resistance to make key gains on these war fronts, the sources said.
Battles between the national forces and the Houthis continued in the provinces of Marib and Baidha, according to military sources.