Terrorist plots to target a diplomatic mission, security and government facilities in Sharurah province and the assassination of security men were thwarted," it said.
Senior interior ministry official Bassam Attiyah said the suspects belong to several "cluster cells" who were operating separately from each other.
"They are aiming to spread terrorism in Saudi Arabia, and they wish to create chaos and rift in the country."
Attiyah also said that the suspects used social media to operate and recruit members.