CNBC reports that according to political risk consultancy Eurasia Group, time may be running out for the U.S. and Iran to restart nuclear talks, as Tehran continues to advance its nuclear program. 

“Given the pace of its nuclear advancements, Iran is nearing the point at which the nuclear deal’s nonproliferation benefits will be unrecoverable without major changes to the accord, at which Tehran would balk,” the analysts said.

The deal is more urgent than ever because of irreversible moves such as Iran gaining knowledge on how to operate advanced centrifuges for uranium enrichment, they said. At the same time, it has reduced the likelihood of a deal being reached.