SANAA, Yemen (AP) — The U.N. special envoy to Yemen visited on Friday the Red Sea port city of Hodeida in efforts to halt hostilities between a Saudi-led coalition and Yemen's Shiite rebels there and lay the groundwork for restarting peace talks, officials said.

Martin Griffiths met with several rebel officials during his short visit to Hodeida, a vital access point for aid to Yemen' population. The coalition backing Yemen's internationally recognized government has been pushing to retake the city from the rebels since the summer. Its offensive has drawn wide criticism from international aid groups who fear a protracted fight could force a shutdown of the port and potentially tip millions into starvation.

Griffiths' visit comes amid mounting international pressure to end the war that has resulted in what the U.N. says is the world's worst humanitarian crisis. The U.N. envoy, who was accompanied by U.N. Humanitarian Coordinator Lise Grande and the WFP chief for Yemen, Stephen Anderson, concluded the visit in a few hours before heading back to the rebel-held capital, Sanaa, the officials said. The spoke on condition of anonymity because they weren't authorized to brief reporters.

Talks to end Yemen's three-year war pitting the Saudi-led coalition and rival Iran-aligned rebels are expected in December in Sweden. Griffiths has said both sides have agreed to attend peace talks. His latest effort to revive peace talks in September fell through after the Houthis didn't attend.

Yemen's ruinous civil war has killed over 10,000 people, badly damaging Yemen's infrastructure and crippling its health system. International aid group Save The Children has said that an estimated 85,000 Yemeni children under the age of 5 may have died of hunger and disease since the outbreak of the war in 2015.

This story has been corrected to restore a dropped word in envoy Griffiths' name.