A further 92 people were wounded in Wednesday’s bombings, the latest in a string of attacks carried out by the ISIS group in Yemen since March.
A suicide bomber blew himself up inside the mosque in the Jarraf district of north Sanaa, and a car bomb was detonated outside minutes later.
Daesh said a man identified as 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 Huthi movement that control Sanaa.
The militants said a bomb-laden vehicle parked nearby also exploded as medics arrived on the scene.
Body parts were blown several metres away from the scene and nearby buildings were damaged, witnesses said, adding that Houthi Forces were deployed after the attack to set up new checkpoints across the capital.
Daesh account was confirmed by sabanews.net, the website close to Houthi movement.
A day earlier, the International Committee of the Red Cross said a gunman killed two of its employees in an “appalling” and “brutal” attack.