FILE - In this Dec. 13, 2018, file, photo, tribesmen loyal to Houthi rebels hold up their weapons as they attend a gathering to show their support for the ongoing peace talks being held in Sweden, in Sanaa, Yemen. The United Nations has cast doubt on the claims by Yemen’s Shiite rebels to have withdrawn from the port of Hodeida, saying such steps can only be credible if all other parties can verify them.(AP Photo/Hani Mohammed, File)
Tribesmen loyal to Houthi rebels hold up their weapons as they attend a gathering in Sanaa. AP

Yemen’s Houthis take villages vital to the northern front