SANAA- Saudi-led warplanes bombed elite Republican Guard forces allied with the dominant Houthi faction in Yemen's conflict today, residents said, and U.N.-sponsored ceasefire talks broke off without a deal to end nearly three months of fighting.

More than 2,600 people have been killed since an Arab alliance led by Saudi Arabia launched air strikes to try to stop the Iranian-backed Houthis from completing a takeover of Yemen and to try to reinstate exiled President Abd-Rabbu Mansour Hadi.

Residents said they heard three air raids on the al-Sawad camp, in a southern suburb of the capital Sanaa where the command of the Republican Guards allied with former president Ali Abdullah Saleh and the Houthis is based, early on Friday.

Three air strikes were also reported in the Khawlan region, southeast of Sanaa, six on a camp that houses the Houthi-allied 115th Infantry Brigade in the al-Hazm district of al-Jouf province, and three more on Houthi positions on the outskirts of the embattled southern port city of Aden.

Residents gave no details on casualties, but the Houthis reported that nine civilians were killed in air strikes on the Razeh district of the northern province of Saada, the Houthis' traditional stronghold bordering on Saudi Arabia.

The Houthis, who hail from the Zaydi branch of Shia Islam, swept out of Saada and seized Sanaa in September before advancing into central and south Yemen including Aden, forcing Hadi's government into exile in Saudi Arabia.

 The group denies drawing military support from Iran and says it is waging a campaign against state corruption and Sunni Muslim al Qaeda militants who gained strength in the south during a 2011 uprising that spread anarchy and ousted Saleh. Saudi Arabia, the world's top oil exporter, intervened militarily out of concern for what it sees as a growing Iranian sway in the Arabian Peninsula, but the coalition has yet to significantly reverse Houthi territorial gains.