(CNN) As the Trump administration continues its hardline approach on Iran, the European Union -- in a bid to preserve the Iran nuclear deal -- is reluctant to impose sanctions for potential violations of that deal, two diplomatic sources told CNN.

Federica Mogherini, the top EU foreign affairs official, has conveyed this sentiment in meetings over recent days, the sources said, even as Tehran has said it would scale back its commitment to the deal, known as the Joint Comprehensive Plan of Action (JCPOA).

One source told CNN, "The EU will not be quick to act here. Don't expect sanctions to fall into place." Another noted that Mogherini "seems to be putting a great deal of process into the mix."

Representatives for the EU did not immediately reply to a CNN request for comment.

On Monday, Iran's atomic energy agency spokesman, Behrouz Kamalvandi, said that the country would accelerate its low-grade uranium enrichment and surpass the 300-kilogram uranium stockpile deal limit on June 27.

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