<p>The director general of the UN nuclear watchdog will visit Tehran on Monday for meetings with senior Iranian officials, the IAEA said on Saturday.</p>.<p>It will be the first visit to Iran by Rafael Mariano Grossi since he took the helm of the International Atomic Energy Agency in December and comes as tensions between European nations and the US over relations with Iran have intensified in recent days.</p>
<p>The director general of the UN nuclear watchdog will visit Tehran on Monday for meetings with senior Iranian officials, the IAEA said on Saturday.</p>.<p>It will be the first visit to Iran by Rafael Mariano Grossi since he took the helm of the International Atomic Energy Agency in December and comes as tensions between European nations and the US over relations with Iran have intensified in recent days.</p>