In its quarterly review of Iran's sanctions adherence over its nuclear programme, Western Nations in the UN Security Council have warned the Islamic Republic that time is running out.
The meeting took place against the backdrop of a damning report from the International Atomic Energy Agency expressing serious concern that Iran is increasing in uranium enrichment to weapons grade - and not providing proof that all its nuclear activities were for peaceful means. South Africa also urged Iran to co-operate fully.
Tough talk from the US Ambassador, a close ally of the Israeli state that has repeatedly threatened to bomb Iran's nuclear sites.
Ambassador to the UN Susan Rice said: "We believe there is still time and space for diplomacy. However the onus is on Iran to respond constructively. The international community should continue to underscore that Iran must take meaningful steps or face increasing pressure. Yet we cannot and will not pursue this path indefinitely."
Iran stands accused of hampering International Atomic Energy Agency inspections, blocking access to certain sites and of sanitizing facilities before inspections. South Africa has urged compliance.
Iran has consistently denied that their activities are in pursuit of a nuclear weapon
South African Ambassador Pieter Vermulen said: "We note that the DG is unable to provide credible assurances about the absence of undeclared nuclear material an activities in Iran. SA therefore encourages Iran to continue its cooperation with the agency because it is the clarification of these outstanding issues that will enable the international community to have full confidence in the exclusive peaceful nature of Iran's nuclear programme."
Iran did not speak at yesterday's briefing but has consistently denied that their activities are in pursuit of a nuclear weapon - something Western Nations made clear they are not buying. British Ambassador Sir Mark Lyall Grant said: "The Iranian regime is at a crossroads, it can continue to ignore the international community's concerns over its nuclear programme or it can negotiate a settlement that will help to realize the benefits of a civil nuclear programme, it can support the oppressive regime in Syria in suppressing freedom, or it can play a constructive role in its region.'
As world leaders set their course for New York for General Assembly week starting on Monday, expect Iran to feature prominently in the debate.