TEHRAN: A massive explosion at a military arms depot near the Iranian capital Tehran killed 27 elite Revolutionary Guards on Saturday and wounded 16 others, state broadcaster IRIB said. Officials said it was an accident which happened as troops were moving ammunition at a base in Bidganeh, near the town of Shahriar, some 45 km (28 miles) west of Tehran. While there was no indication of any attack, the explosion shook homes and rattled windows for miles around at a time of mounting tensions with Israel over Iran's nuclear programme. "So far, 27 personnel of Revolutionary Guards have been martyred...