The interior ministry also identified the two jihadists who detonated explosive belts during Saturday's raid in the Red Sea city of Jeddah as Saudis.
Marzouk Anzi and Khaled al-Sourwani had both taken part in previous jihadist attacks in the kingdom, and Sourwani had links with the Islamic State group, the ministry said.
Authorities also seized arms and materials for making explosives from the building where the men blew themselves up, the official Saudi Press Agency said.
Those arrested included two Pakistanis, a Syrian and a Sudanese citizen.
Saudi Arabia is a member of a US-led coalition battling IS in Syria and Iraq.
The kingdom has witnessed a series of deadly attacks claimed by IS since late 2014, mostly targeting the Shiite minority and security forces, killing dozens of people.
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