The UN envoy Ismail Ould Cheikh arrived in the capital city of Sanaa on Sunday in a new effort to make the conflict parties agree to a humanitarian ceasefire in Yemen.
He told reporters that he will meet with officials from the Houthi group to discuss the timeframe and other details of the ceasefire.
Reports said the truce is expected to begin this week.
Yemen has been experiencing a humanitarian catastrophe because of the months-long confrontations between the pro-government and pro-Houthi forces as well as a blockade on its sea, land and air routes.
The blockade was part of a Saudi-led Arab military intervention launched against the Houthi militants in late March.
It has been blamed on severe shortages of supplies especially fuels and medicines that have forced most of the country's hospitals to shut down.
Lately, international organizations warned of an imminent famine amid the lack of foodstuffs.
Moreover, organizations said the persistent conflict has been preventing relief organizations from reaching the violence-affected people.
Around 80% of the Yemeni population are in need of emergency aid, according to statements by the government and organizations.
The visit came after visits by Cheikh to Saudi Arabia and some of the other GCC states where he met with officials from the government over the topic.
The government, which was ousted by the Houthi militants early this year, has been staying in Riyadh for months.
It and the Houthi militants have been trading accusations of hindering aid and inflaming violence.