Iran has turned to Greece to convey messages to the United States regarding its contentious nuclear program and other disputes, officials said Friday. Their comments suggested Teheran might be willing to engage Washington in an effort to thwart momentum toward a UN Security Council resolution that could hit Teheran with sanctions over its nuclear defiance. US State Department spokesman Sean McCormack on Wednesday confirmed the existence of "ad-hoc channels ... going back over the past year" that allow Washington and Teheran to speak through third parties. He did not go into specifics. But on Friday a US official familiar with the contacts named Greece as a conduit, telling AP: "The Greeks have been active as a liaison."