India, June 13 -- As Washington and Tehran move closer to a possible agreement over Iran's nuclear programme, Iran has reportedly strengthened protections around its stockpile of highly-enriched uranium, making any future retrieval effort far more difficult.

According to a CNN report citing five sources familiar with US intelligence, Iran has in recent weeks "collapsed tunnels" leading to its uranium stockpile and "booby-trapped" entrances with explosive mines, making access significantly more difficult. The measures have effectively sealed off material believed to be close to bomb-grade enrichment. Track US-Iran war live updates.

The developments come just weeks after US President Donald Trump publicly floated the possibility of orderi...