A suicide car bomber has struck Yemen's Defence Ministry, killing 52 soldiers and paving the way for a carload of gunmen wearing army uniforms to storm the heavily guarded compound in the capital of Sanaa, military and hospital officials said.
The brazen morning attack underlined the ability of insurgents to strike at the heart of the government as they exploit the instability that has plagued the US-allied country for more than two years. Yemen's Defence Minister Mohammed Nasser Ahmed was in Washington on Thursday for talks with US officials.
Nobody immediately claimed responsibility for the attack, but suicide bombings and complex attacks are the hallmarks of al-Qaeda.
The US considers Yemen's al-Qaeda branch, known as al-Qaeda in the Arabian Peninsula, to be the world's most active and has in recent months sharply escalated drone attack targeting the militants. American forces also have been training and arming Yemeni special forces, and exchanging intelligence with the central government.
The terror network gained a major foothold in the south, taking over several towns amid the chaos that followed the 2011 uprising that ousted longtime President Ali Abdullah Saleh. The drone strikes and a series of US-backed military offensives helped uproot several key militant strongholds, but al-Qaida continues to fight back.