The Saudi-led coalition has deployed around 10.000 more troops mostly from the GCC countries, dozens of Apache helicopters and hundreds more tanks and armored cars to Yemen.
Aljazeera TV said on Sunday the reinforcements come within the preparations for the battle to retake the capital city of Sanaa from the Houthi militants.
The coalition has been sending troops and equipment to back the Yemeni forces to drive the Houthi militants out of the oil-rich Marib and Jawf provinces and then advance toward Sanaa.
It launched a military intervention against the Houthi militants and forces loyal to the former president in March.
The latest reinforcements came two days after scores of troops from the coalition were killed in a Toshka missile attack by units from the Republican Guard loyal to the former president and Houthis.
GCC leaders have vowed to take revenge for their losses as fighter jets have already started heaviest airstrikes against the Houthis in the capital Sanaa and other cities.
Separately, Human Rights Watch said in a statement Sunday that Houthi forces apparently laid banned antipersonnel landmines in the Yemeni port of Aden before withdrawing from the city in July.
The Houthis, also known as Ansar Allah, may also be responsible for laying new antipersonnel mines in Abyan governorate, northwest of Aden, it said.
Landmines and explosive remnants of war killed at least 11 people and wounded over 12 in Aden in August, according to Yemeni mine clearance officials and media reports, it said, pointing out that two deminers were among those seriously wounded.
“Yemen, like most countries, has banned antipersonnel mines, so it’s of grave concern to see these indiscriminate weapons used in the south,” said Steve Goose, arms director at Human Rights Watch. “Houthi forces should immediately cease using antipersonnel mines and respect Yemen’s obligations as a party to the Mine Ban Treaty.”
The United Nations Human Rights Council should create a commission of inquiry to investigate alleged serious laws-of-war violations by all parties to the current conflict in Yemen, Human Rights Watch and 22 other human rights and humanitarian organizations said in August.
Since Houthi forces retreated from Aden there has been no evidence to suggest that southern fighters or members of the Saudi-led coalition have used mines, according to the statement.