The United States, Britain and France warned Iran yesterday that time is running out for a negotiated settlement to the showdown on its nuclear programme.

“Time is wasting,” US ambassador Susan Rice told a UN Security Council meeting on nuclear sanctions against Iran.

Iran is “at a crossroads”, Britain’s UN envoy Mark Lyall Grant told the meeting at which western nations also slammed Iran for its arms deliveries to Syria and alleged links to terrorism.

The meeting was held amid mounting speculation that Israel is planning a military strike on Iran’s nuclear facilities. Iran’s President Mahmoud Ahmadinejad is to speak at the UN General Assembly of world leaders next week.

A series of reports by the Inter­national Atomic Energy Agency, the UN nuclear watchdog, have said Iran is stepping up uranium enrichment and not providing proof that its nuclear activities are peaceful.

The western powers say Iran is seeking a nuclear bomb but the Tehran government says its drive is peaceful.

No Iranian diplomat spoke at the meeting where Rice said the international powers – Britain, China, France, Germany, Russia and US – cannot pursue their nuclear talks with Iran “indefinitely”.

“We will not engage in an endless process of negotiations that fail to produce any results. We must therefore remain clear and united in seeking resolution of the inter­national community’s concerns re­garding Iran’s nuclear programme. Time is wasting,” the US envoy said.

Top officials from the six inter­national powers are to meet in New York next week to discuss Iran. But Russia and China have spoken against tightening the four rounds of UN sanctions already imposed.

Rice said “Iran’s approach remains to deny, to deceive and distract.”

She called on UN members, particularly neighbours of Iran, to step up action to halt Syria’s arms shipments to President Bashar al-Assad’s forces in Syria.

UN sanctions experts have uncovered evidence of shipments and diplomats said that Iran is sending some weapons by air across Iraqi territory.

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