<p>After nightfall, Sanaa sank into complete darkness after a sudden power outage, as protesters took control of a vital bridge, halting traffic and setting up tents.</p>.<p>Thousands of other protesters attacked government buildings and set fires to buildings they said were used by snipers and pro-government thugs.<br />Sunday's attack was the deadliest in months against protesters and comes as tensions have been escalating in the long, drawn-out stalemate between the regime and the opposition.</p>.<p>More than 100,000 protesters massed Sunday around the state radio building and government offices, witnesses said.<br /><br />When the crowd began to march toward the nearby Presidential Palace, security forces opened fire and shot tear gas canisters, they said.<br /><br />Snipers fired down at the crowd from nearby rooftops, and plainclothes Saleh supporters armed with automatic rifles, swords and batons attacked the protesters.<br /><br />Protesters took control of a main bridge, closed off the entrances and set fire to tents in a camp used by pro-government forces.</p>.<p>Tarek Noaman, a doctor at Sanaa field hospital, said that 26 protesters were shot dead and more than 200 were wounded.</p>.<p>"Most of the injuries are at the chest, shoulder, head and face," he said, and said 25 of injured protesters were in critical condition.<br /><br />He accused security forces of preventing ambulances from evacuating the wounded and collecting bodies of the slain protesters.</p>
<p>After nightfall, Sanaa sank into complete darkness after a sudden power outage, as protesters took control of a vital bridge, halting traffic and setting up tents.</p>.<p>Thousands of other protesters attacked government buildings and set fires to buildings they said were used by snipers and pro-government thugs.<br />Sunday's attack was the deadliest in months against protesters and comes as tensions have been escalating in the long, drawn-out stalemate between the regime and the opposition.</p>.<p>More than 100,000 protesters massed Sunday around the state radio building and government offices, witnesses said.<br /><br />When the crowd began to march toward the nearby Presidential Palace, security forces opened fire and shot tear gas canisters, they said.<br /><br />Snipers fired down at the crowd from nearby rooftops, and plainclothes Saleh supporters armed with automatic rifles, swords and batons attacked the protesters.<br /><br />Protesters took control of a main bridge, closed off the entrances and set fire to tents in a camp used by pro-government forces.</p>.<p>Tarek Noaman, a doctor at Sanaa field hospital, said that 26 protesters were shot dead and more than 200 were wounded.</p>.<p>"Most of the injuries are at the chest, shoulder, head and face," he said, and said 25 of injured protesters were in critical condition.<br /><br />He accused security forces of preventing ambulances from evacuating the wounded and collecting bodies of the slain protesters.</p>