The leader identified as Abu Osama al-Muhajir was caught in an early June raid along with other members of the jihadist group including its chief financial officer, coalition spokesman Turki al-Maliki said in a statement.

Saudi special forces in cooperation with their Yemeni counterparts "conducted a successful operation that resulted in the capture of the leader of the Daesh (IS) branch in Yemen -- Abu Osama al-Muhajir," Maliki said.

"A house kept under close surveillance proved the presence of the terror group's leader, and other elements, along with three women and three children."

Maliki did not specify where the operation was conducted.

Photographs of the raid released by Saudi authorities showed blindfolded and handcuffed men in the custody of soldiers.

Weapons, ammunition, laptops, cash in various currencies and GPS devices were among the items seized in the raid, Maliki said, adding there were no civilian casualties.

IS and other jihadist groups have flourished in the chaos of the country's civil war, which pits the government -- backed by the Saudi-led coalition -- against Shiite Huthi rebels.

The operation marks a setback for the local franchise of IS, one of several on which the group relies especially after losing its self-styled "caliphate" across large parts of Syria and Iraq.

Its Yemeni branch is said to run camps and has a number of active fighters across Yemen.

"Al Qaeda and (IS) have long ago declared Saudi Arabia to be their number one enemy," Prince Khalid bin Salman, the kingdom's deputy defence minister, said on Twitter.

"The kingdom wears that declaration as a badge of honour. We will not rest until terrorism and extremism... are completely eradicated."

Al-Qaeda in the Arabian Peninsula (AQAP), considered by the US as the radical group's most dangerous branch, is also active in Yemen.

Last month, four suspected Al-Qaeda members were killed in a suicide attack claimed by IS in Bayda province, a local official told AFP.

A long-running US drone war against AQAP has intensified since President Donald Trump took office in January 2017.

The more than four-year conflict in Yemen has killed tens of thousands of people, many of them civilians, relief agencies say.

The fighting has triggered what the United Nations describes as the world's worst humanitarian crisis, with millions of people displaced and in need of aid.