VIENNA (Reuters) - A major speech by Iran's Supreme Leader has limited the ability of the Iranian delegation at high-level nuclear talks to make concessions with six world powers and this could scuttle chances for Tehran to reach an accord to end sanctions, diplomats said.
In a public address filled with technical detail, Ayatollah Ali Khamenei said last week Iran needs to significantly increase its uranium enrichment capacity, clashing with the powers' push for it to be reduced to minimise the risk of nuclear bombmaking, as July 20 deadline for a deal nears.