BERLIN (AP) — The top diplomats of Britain, France, and Germany threatened to reimpose sanctions on Iran as an end-of-the-month deadline nears for the country to resume negotiations with the West over its nuclear program and cooperation with the United Nations nuclear watchdog.

France, Germany and the UK were signatories to the 2015 Joint Comprehensive Plan of Action (JCPOA) alongside the United States, China, Russia and the European Union. The accord required Iran to limit its uranium enrichment in exchange for sanctions relief.

France, Germany and the UK have told the UN they are prepared to trigger the reimposition of sanctions on Iran unless it resumes negotiations with the US over its nuclear programme.