United Nations special envoy to Yemen Martin Griffiths arrived in the Yemeni capital Sanaa on Monday as part of UN efforts to revive the stalled Stockholm deal, reached one year ago between the legitimate government and Iran-backed Houthi militias.

This is Griffiths’ second visit to Sanaa in a month to meet Houthi officials amid their ongoing field escalations across the country.

The UN-brokered Stockholm deal was reached by the legitimate Yemeni government and Houthis in Sweden on December 13, 2018 to mainly bring stability to the port city of Hodeidah.

Meanwhile, Yemeni Foreign Minister Mohammed Al-Hadhrami discussed Monday with the ambassadors of the UN Security Council five member countries to Yemen the challenges facing the implementation of the Riyadh Agreement signed by the government and the Southern Transitional Council (STC) in November, Yemen’s Saba news agency said.

“Unfortunately, there are some obstacles that the STC is placing in the way of implementing the agreement,” official sources quoted the minister as saying during the meeting in Riyadh.

Al-Hadhrami praised Saudi support aimed at implementing the Riyadh Agreement on the ground, expressing the government’s confidence in the Kingdom’s role in restoring calm in Yemen.

For their part, the ambassadors voiced support to Yemen's government for ensuring the enforcement of the deal.

In separate statements delivered during his meeting with Russian ambassador to Yemen Vladimir Didushkin, al-Hadharmi said lasting and comprehensive peace requires commitment to the UN resolutions.