Saudi Arabia arrested 431 people as part of a crackdown on a cluster of cells linked to the Islamic State of Iraq and Syria (ISIS) militant group, the kingdom’s Ministry of Interior (MOI) said. Authorities also thwarted seven mosque attacks that had been planned by the suspects in the capital Riyadh as well as the Eastern Province, MOI Spokesman Maj. Gen. Mansour Al Turki said in a press conference carried by Al Arabiya News Channel. Among the arrested were Saudi nationals and suspects from nine other nationalities, he said adding that the cluster of cells was divided by tasks and...