The E3 letter follows months of diplomatic stalemate, particularly after a 12-day war between Iran and Israel in June.

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.

The United Kingdom, Germany and France, known as the 'E3,' told the UN Security Council and the International Atomic Energy Agency that they are giving Iran until the end of August to address international concerns.