The incident took place a day after an unidentified warplane attacked the presidential palace in the southern city of Aden. There was no immediate claim of responsibility for the mosque bombings. However supporters of Islamic State, an al Qaeda offshoot that has seized large areas of Iraq and Syria, used Twitter to welcome the attacks. Hospitals in Sanaa appealed immediately for blood donors. Another suicide bomber tried to blow himself up in one of the main mosques in the northern Houthi stronghold of Sadaa province but the bomb went off prematurely, killing the bomber only. Sanaa has seen heavy violence since Houthi fighters stormed the city in September. In February, the rebel group dissolved the parliament and took control of the government.
