BRUSSELS, July 7 (Reuters) – The European Union on Sunday strongly urged Iran to stop actions that would undermine a landmark 2015 nuclear deal, saying it was in touch with other parties to the deal and may set up a joint commission to look into the issue.

“We are extremely concerned at Iran‘s announcement that it has started uranium enrichment above the limit of 3.67%,” spokeswoman Maja Kocijancic for EU foreign policy chief Federica Mogherini said in a statement.

“We strongly urge Iran to stop and reverse all activities inconsistent with its commitments … We are in contact with the other JCPOA (Joint Comprehensive Plan of Action) participants regarding the next steps under the terms of the JCPOA, including a Joint Commission,” she said.

The JCPOA is the deal between Iran and the six powers.

(Reporting by Foo Yun Chee Editing by Alexandra Hudson)