TEHRAN (AFP) – The international pressure being exerted on Syria is "unacceptable", the Iranian foreign ministry said, in its first reaction to a UN resolution over the murder of former Lebanese premier Rafiq Hariri.  "We support Syria without any doubt. Syria is our friend," foreign ministry spokesman Hamid Reza Asefi told reporters on Sunday."The pressure on Syria is unacceptable and is above all motivated by political pressure," said Asefi, whose country is Damascus’ main ally in the region.His comments came after the adoption by the UN Security Council last week of a resolution urging Syria to cooperate fully with the UN probe into the murder Hariri or face international action."We think that this resolution has to be based on reality and cannot be arbitrary," Asefi said.