The deadly fighting that rocked the Yemeni capital this week spreads beyond Sanaa as armed tribesmen seeking to oust President Ali Abdullah Saleh seize two military camps in battles that kill at least 18 and prompt airstrikes by government warplanes. The fighting brings to at least 124 the number killed in the past five days of bloodshed, which has hiked fears that the Arab world's poorest country could be thrown into civil war as Saleh clings to power in the face of peaceful protests demanding his ouster.
Amid the chaos, hundreds of Islamic militants seize control of a southern city, killing eight policemen and two civilians in gunfights.
Russia abandons one-time ally Moammar Gadhafi and offers to mediate a deal for the Libyan leader to leave the country he has ruled for more than 40 years. The striking proposal by a leading critic of the NATO bombing campaign reflects growing international frustration with the Libyan crisis and a desire by the Kremlin for influence in the rapidly changing Arab landscape.
Syrian security forces open fire on anti-government demonstrations, killing at least eight people as thousands take to the streets despite the near-certainty they would face gunfire, tear gas and stun guns, human rights activists and witnesses say. Protests erupt in the capital, Damascus, and the coastal city of Banias, the central city of Homs and elsewhere.
Thousands of protesters return to downtown Cairo's Tahrir Square for what they call a "second revolution," pressing Egypt's military rulers to speed up the pace of democratic reforms in a country that is still charting its political future. Protesters carry banners reading the "Egyptian revolution is not over" and chant the slogan. They also call for the speedy trial of Hosni Mubarak and high-ranking members of his regime.