Iranian authorities have rounded up at least 50 people suspected of links to militant groups in a Western province, a prosecutor said today, the latest in a wave of arrests following twin bomb and gun attacks in Tehran in early June.<br/><br/>The arrests have been made days after Iranian Revolutionary Guards fired missiles from western Iran into eastern Syria, aimed at bases of the Islamic State which had claimed responsibility for the June 7 attacks in the capital Tehran that killed 18 people. <br/><br/>Provincial prosecutor Nemat Sadeqi told the state news agency IRNA that an appreciable number of suicide belts, electronic detonators, and weapons have been seized from the detainees.<br/><br/>Iranian authorities have announced dozens of arrests following the Tehran attacks. yesterday, state media said security forces arrested members of a group linked to Islamic State which had planned bombings and suicide attacks in Shi'ite Muslim religious centres.