Sixteen policemen were killed and 13 others were wounded in the October 2017 shootout following an ambush in the Western Desert.
The Iran-backed militia launched four ballistic missiles and drones towards a military position in Mokha, killing six people, including four civilians.
ISIS was on the back foot in Yemen before the death and replacement of Abu Bakr al-Baghdadi, and seems set to face further decline.
The Muslim minority from China's Xinjiang province has suffered persecution at home, a situation that was exploited by al-Qaeda and ISIS in Iraq and Syria.
Little is known about 'Abu Ibrahim al-Hashemi al-Qurashi', whose name was seldom mentioned as a possible successor to al-Baghdadi.
Internal conflicts plaguing the Iran-backed militia have worsened corruption and led to plundering of public resources.
The violence comes amid the continuing failure of the separatists and the Yemeni government to reach an agreement in Jeddah.
Yemeni soldiers and civilians and Arab coalition security forces, including a senior officer, were killed in two separate Thursday attacks.
Saudi Energy Minister says the kingdom wants 'proof based on professionalism and internationally recognised standards'.
Egyptian forces engaged in two shootouts with extremists Sunday that left all the militants dead and four security personnel wounded.