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 in Sanaa, Yemen. U.N. experts say fuel is being shipped illegally from Iran to Houthi Shiite rebels in Yemen to finance their war against the government, and both sides are violating international law with their military campaigns and arbitrary detention of rivals. (AP Photo/Hani Mohammed, File)
Tribesmen loyal to Houthi rebels hold up their weapons as they attend a gathering to show their support for the ongoing peace talks in Sanaa, Yemen. AP

Yemeni minister accuses Houthis of violating ceasefire and thousands of 'criminal acts'