14 June 2012 :

the Iranian foreign ministry summoned Saudi Charge D'Affaires Hassan Zaid in the absence of Saudi ambassador to Tehran after the execution of a number of Iranians accused of drug trafficking.
In a meeting between Director of Persian Gulf Affairs at the Iranian Foreign Ministry Alireza Enayati and the Saudi official, Tehran strongly criticized the inhuman action of the Saudi government over the Iranian citizens jailed there.
The Iranian official condemned the executions and the situation of Iranian citizens in Saudi prisons and called for the immediate explanation of Riyadh in this regard.
Enayati protested at Riyadh's foul treatment of Iranian nationals jailed in the kingdom, adding that Saudi Arabia's refusal to give a clear response to Tehran will not free Riyadh from its legal and international responsibilities and its commitments within the framework of international conventions on the rights of prisoners.
Saudi charge d'affaires to Tehran, for his part, said that he would reflect the issue to the Riyadh government and announce their respective reply upon receiving it.
The Iranian foreign ministry had also in May summoned the Saudi envoy to Tehran over the status and fate of the Iranian inmates in the Arab country.
Iranian Deputy Foreign Minister for Consular, Parliamentary and Expatriates' Affairs Hassan Qashqavi announced the news, and said the latest status of the Iranian inmates in Saudi Arabia was discussed during the meeting.
He said that his ministry has made continued efforts to restore the rights of the Iranian inmates in Saudi Arabia.
Qashqavi added that the foreign minister himself is pursuing their case through direct contacts with relevant Saudi officials, including his Saudi counterpart.