Saudi Arabia has said it arrested 10 members of a "terrorist cell", some of whom underwent military and explosives training at Islamic Revolutionary Guard Corps (IRGC) camps in Iran.
Tehran on Tuesday denied the charges.
Saudi security authorities said that weapons and explosives stored at a house and a farm were seized, but did not say where the raid or the arrests last week were carried out.
"Competent authorities at the presidency thwarted a terrorist cell... whose elements received military and field training on how to make explosives, at the [IRGC's] sites in Iran," the State Security Presidency said in a statement late Monday (September 28th).
"Security investigations revealed the elements' identities as well as two sites used by the elements to store weapons and explosives," said the statement carried on official media.
It said that among the items seized were improvised explosive devices (IEDs), dozens of stun guns, kilos of gunpowder and a variety of rifles and pistols.
Among the 10 people detained, whose identities were being kept under wraps, three had undergone training in Iran, it added.
"The competent authorities are investigating all elements arrested to find out more information about their activities and the persons connected to them in the kingdom and abroad," the statement said.