FNA- Tehran's Public and Revolution Courts Prosecutor Abbas Jafari Dolatabadi announced that Iranian security forces have detained a number of suspects "collecting classified intelligence in strategic fields".

Jafari Dolatabadi told reporters in Tehran on Saturday that the detained suspects "collected the country's classified intelligence in strategic fields on the pretext of implementing scientific and environmental projects".

He added that they were arrested by one of the Iranian security bodies and are under detention by Tehran prosecutor's office.

Deputy Head of the Islamic Revolution Guards Corps' Counter Intelligence Organization Brigadier General Hassan Emami warned on Wednesday that certain foreign spy agencies are seeking to infiltrate the IRGC Quds Force and its Aerospace Force.

"The foreign spy agencies are after gathering intelligence, hiring spies and infiltrating sensitive fields, research centers, the IRGC Aerospace Force, Quds Force and other centers," General Emami said.

He underlined his forces' vigilance to confront the foreign spy agencies' plots, and said they monitor the enemies' activities against the IRGC not only inside the country but also outside the borders.

"We adopt counter and offensive measures (against them)," General Emami said.

Every year, Iran identifies and arrests several spies working for foreign intelligence agencies.

Jafari Dolatabadi announced in October that an agent of Israeli spy agency, Mossad, has received the death sentence.

"One of the crimes of the convict has been disclosing the address and some details of 30 important figures involved in (the country's) research, military and nuclear projects, including (Iranian nuclear scientists) martyrs Shahriari and Alimohammadi, to Mossad intelligence officers which led to their assassination and martyrdom," Jafari Dolatabadi said.

He added that the spy had held numerous meetings with 8 Mossad officers and leaked intel about Iran's military and nuclear sites in exchange for money and receiving residence in Sweden.

Dolatabadi had announced in September that Iran's judicial system has sentenced four individuals to long jail terms for spying for the US.

"A court in Tehran has sentenced four infiltrators and US-linked agents to 10-year jail terms each; the ruling has been confirmed by the country's Appeals Court," Jafari Dolatabadi said, addressing the eighth meeting of Tehran prosecutor deputies.

He noted that one of the cases is related to conviction of a US national who had come to Iran to take part in post-graduate courses, and said, "The three other convicts include a Lebanese national and two Iranians (a father and his son)."

Jafari Dolatabadi underlined that all of the four convicts have been sentenced to 10 years in prison.