The window is closing for negotiators in Vienna to reach a deal.

Axar.az reports citing foreign media, US Secretary of State Antony Blinken told reporters in Geneva on Friday that Iran’s nuclear weapons program is one area where the United States and Russia can work together and that the two countries are on a “clearer path” to understanding each other’s concerns.

The top US diplomat met with his Russian counterpart, Sergey Lavrov, in Geneva on Friday for talks focused on the crisis in Ukraine. But the pair also discussed the ongoing talks in Vienna aimed at restoring a landmark nuclear agreement, known as the Joint Comprehensive Plan of Action (JCPOA).

The talks have reached a “decisive moment,” Blinken said, adding that a deal must be reached in the next few weeks or Iran’s nuclear advances will make a return to a deal meaningless.

A senior European Union official offered a similar assessment on Friday, saying that negotiators are “on the right track for a final agreement” but moving too slowly.

“It would be an incredible mistake if, because of timing, we would not get a good solution," the official said.