Islamic State claimed that Qusai al-Sanaani blew himself up after sunset prayers inside the Al-Muayad mosque in the northern Jarraf district, home to many senior figures from the Shiite Houthi rebels that control Sana'a.
The militants said a bomb-laden vehicle parked nearby also exploded as medics arrived on the scene, bringing the death toll to at least 28 people and wounding some 75 more, according to medical officials.