Authorities in Bahrain say they have arrested 47 members of a group thought to have links to "terrorist elements in Iran," foiling imminent attacks in the kingdom.
Bahrain's Interior Ministry said a large number of explosives and weapons were also found during raids that uncovered secret caches in residential areas of several villages.
The ministry said the arrests focused on an organization with "strong links to Iranian parties and terrorists residing in Iran."
It said some of those arrested received training in Iran on using weapons and manufacturing explosives.
Sunni-ruled Bahrain is a Shi'ite-majority country that has been hit by unrest since a pro-democracy uprising in February 2011.
Bahrain's Sunni leaders have repeatedly accused Iran of meddling in Bahrain's internal affairs.
Iran denies the accusations and has criticized the arrests of Shi'ite opposition figures and activists in Bahrain.