State expressed 'deep concerns'.
U.S. diplomats concluded in late 2008 that the government of Armenia had supplied Iran with rockets and machine guns later used to kill American troops in Iraq, according to State Department cables disclosed by WikiLeaks.
John D. Negroponte, deputy secretary of state at the time, wrote a December 2008 letter to Armenian President Serzh Sargsyan expressing "deep concerns about Armenia's transfer of arms to Iran which resulted in the death and injury of U.S. soldiers in Iraq."
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More News On Armenia Supplying Weapons To Iran That Resulted In U.S. Deaths
Top Armenian Officials Decline Comment On 'Arms Supplies' To Iran Allegations -- Radio Free Europe
Wikileaks: Armenia supplied Iran with weapons used to kill U.S. troops -- Azeri Report
Armenia: WikiLeaks Cables Cause Stir in Yerevan -- Eurasian Net
Wikileaks: Armenia Threatened with Sanctions after Iran Arms Deal -- Export Law
My Comment: The following question still needs to be answered .... why did Armenia send weapons to Iran?