UN watchdog asks Iran to clarify tunnels but upbeat on deal

The head of the UN nuclear watchdog agency called Wednesday on Iran to explain tunnels built around a nuclear site but voiced optimism that US-Iran talks would land a deal.

The Institute for Science and International Security, a Washington think tank, released satellite imagery on Wednesday that it said showed a new, deeply buried tunnel alongside an older one around the Natanz site, as well as a new security perimeter.

“I’ve been raising this issue repeatedly, and I will continue to do so,”…