Saudi Arabian authorities have announced that six different possible attacks have been thwarted in addition to hundreds of suspects being arrested for belonging to ISIS.
Arrests have been made of 431 people suspected of belonging to ISIS.
The announcement comes after a car bomb attack claimed by ISIS targeted a checkpoint near the Kingdom's highest security prison on Thursday, killing the driver and wounding two security officials.
Saudi Arabia’s Interior Ministry released a statement on Saturday stating that "several attacks have been thwarted including suicide bombings using explosive belts targeting the Mosques in Riyadh, which accommodate over three thousand worshipers.”
"The number arrested to date is 431, most of them citizens, in addition to participants from other nationalities ... six successive suicide operations which targeted mosques in the Eastern province on every Friday timed with assassinations of security men were thwarted," the statement posted on the official news agency SPA said.
"Terrorist plots targeting a diplomatic mission, security and government facilities in Sharurah province and the assassination of security men were thwarted," it added.
ISIS controls large swathes of Iraq and 50 percent of Syria, working with affiliates across Africa - such as Boko Haram in Nigeria, Chad and Cameroon - and several other allied militant groups in North Africa, including Wilayet Sinai (Sinai Province), in Egypt.