The former Iranian ambassador to Italy and Mexico is calling for the execution of a US citizen suspected of espionage in the spot where Iranian nuclear scientist Mostafa Ahmadi Roshan was killed last week.
Suspected CIA spy Amir Mirzai Hekmati was arrested last month by Iran intelligence services on suspicion he spied for the US.
- Report: Mossad killed Iranian scientist
"The terrorist attack on the scientist must not be left unanswered and therefore it is advisable to immediately execute the American spy at the site of the explosion," Ambassador Mohamed Hassan Qadiri wrote on his blog.
He noted that had the two Americans charged with espionage Shane Bauer and Joshua Fattal not been released, their execution could also have been put on the agenda.
The former ambassador said this would have enhanced the Iranian people's alertness "in detecting spies, especially from America and Israel and relaying their details to the security services."
Funeral of scientist Mostafa Ahmadi Roshan
On Saturday, the Iranian foreign minister said Tehran holds reliable documents proving that Roshan's assassination was planned and backed by the CIA.
Meanwhile, Britain's Foreign Secretary said Sunday that European nations will intensify pressure on Iran over its nuclear program, but insisted the West wasn't pressing for military action.
William Hague told Sky News television that he believed the European Union would agree tough new sanctions against Tehran's oil sector later this month, and would continue to look for peaceful methods of persuading Iran to ditch its pursuit of a nuclear weapon.
"We have never ruled anything out. We have not ruled out any option, or supporting any option. We believe all options should be on the table, that is part of the pressure on Iran, but we are clearly not calling for or advocating military action," Hague said.
AP contributed to this report
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