Iran's Revolutionary Guard today said, it had shot down a US spy drone over its territory after it violated Iranian airspace. According to Iranian state television, the American-made Global Hawk surveillance drone was brought down by its Air Force in the southern coastal province of Hormozgan. However, no pictures of the drone were provided.<br />''<br />''<span style="color: #222222;">The incident comes amid tensions between Iran and US. Washington accuses Tehran of being behind a series of operations against oil tankers in Gulf waters. Iran has denied involvement and instead suggested US could be behind the attacks.</span><br />