According to Reuters, a senior US official has read out the text of a signed agreement with Iran, but says the parties can walk away until a binding deal is reached.

Both Iran and the US can walk away from the memorandum of understanding (MoU) they are set to sign on Friday, and upcoming talks are likely to focus on the precise sequencing of the steps previewed in the preliminary accord, the official adds.

Speaking on condition of anonymity, the official has read out the 14-point memorandum due to be formally signed in Switzerland. They add that the upcoming meeting will be “critical” for ensuring that the MoU can evolve into a comprehensive agreement.

“I think the meeting in Switzerland will be quite critical in order to really see how we get to the next phase,” a senior US official says.

The document, as read out by the official, is similar to the 14-point memorandum that various media outlets, including Reuters, had already reported on earlier in the day.