Iran announced on Sunday it has arrested four people suspected of attempting to sabotage one of its nuclear plants.
Iran announced on Sunday it has arrested four people suspected of attempting to sabotage one of its nuclear plants.
"Some time ago, we uncovered sabotage activities by several people at a nuclear plant," Atomic Energy Organisation chief Ali Akbar Salehi said.
"We let them continue their activities so that we could gather more intelligence,” Mehr news agency quoted Salehi as saying.
"We arrested them at the appropriate moment and their interrogation is ongoing."
But Salehi did not specify which of Iran's nuclear plants was targeted.
"There are still viruses out there but we have taken the necessary measures," Salehi added.
"Since we uncovered the Stuxnet virus, we have reinforced our protection systems and a special unit has been set up."
Several Iranian nuclear engineers have been assassinated by foreign intelligence services.