ADEN - Saudi-led aircraft pounded Iran-allied Houthi militiamen and rebel army units in central Yemen and the capital Sanaa on Monday, residents said, reporting that food and medical supplies were running low.
They said warplanes flew between 15 and 20 sorties against groups of Houthi fighters and arms depots in the al-Dhalea provincial capital, Dhalea, and the nearby city of Qa'ataba, between dawn and 0900 local time (0600 GMT), setting off a chain of explosions.
Dhalea residents said sounds of explosions could be heard for two hours after the strikes.
Saudi-led warplanes also struck the area around the presidential compound in Sanaa for a second day, while heavy street fighting was under way in the strategically important city of Taiz in central Yemen, according to residents and the International Committee of the Red Cross.
There were no immediate reports on the extent of casualties.
A coalition of Arab countries led by Saudi Arabia, rattled by what they saw as expanding Iranian influence in the Arabian Peninsula, has carried out nearly five weeks of air strikes on Houthi fighters and loyalists of former President Ali Abdullah Salah who have together seized large parts of Yemen.
Fighting has killed more than 1,000 people, including an estimated 551 civilians since the bombings started on March 26, the United Nations said on Friday. Its children's agency UNICEF said at least 115 children were among the dead.
Saudi Arabia, the world's top oil exporter and arch Sunni Muslim regional rival of Shi'ite Muslim Iran, says it was concerned over its own security after Houthi forces began advancing across Yemen, on its southern border, in September, when the Shi'ite militia captured the capital.
The Houthis allege President Abd-Rabbu Mansour Hadi fostered Islamist militants linked to al Qaeda and corrupt officials. Hadi, who fought al Qaeda when he had control of the country, says the Islamist militant group is as much a threat to Yemen as it had always been.
The Houthi advance eventually forced Hadi into exile into Saudi Arabia, and Riyadh says it wants to restore Hadi and prevent Yemen disintegrating as a state, with al Qaeda militants thriving in the chaos and one of the world's busiest oil shipping lanes off the Yemeni coast at risk.