Iranian diplomats met counterparts from Germany, Britain and France on Friday for renewed nuclear talks, amid warnings that the three European powers could trigger "snapback" sanctions outlined under the 2015 deal.

The meeting in Istanbul was the first since Israel's mid-June attack on Iran, which sparked a 12-day war and targeted key nuclear and military sites.

The European diplomats were seen leaving the Iranian consulate in the city, the venue for the talks, shortly before 2:00 pm (1100 GMT), after several hours inside.

There was no immediate information given by either side about the meeting.

Israel's offensive -- which killed top commanders, nuclear scientists and hundreds of others as residential areas were struck as well -- also derailed US-Iran nuclear talks that began in April.

Since then, the European powers, known as the E3, have threatened to trigger the "snapback mechanism", which would reinstate UN sanctions on Iran by the end of August, under the moribund 2015 nuclear deal.

The option to trigger the snapback expires in October, and Tehran has warned of consequences should the E3 opt to activate it.

"Inaction by the E3 is not an option," a........

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