Yemen's government said Sunday it will accept a truce offer only if the rebels operating in the country's north comply with six previously laid-out conditions. The Shiite Muslim rebels, known as the Houthis, had indicated Saturday that they were open to a cease-fire and to accepting the government conditions. But they demanded an end to military operations first. The intractable stance on both sides means the conflict, which had lasted more than five years, is likely to continue. In August, Yemen laid out cease-fire terms that included removing checkpoints, ending banditry, handing over all military equipment and weapons, and releasing...