Iran attacked and seized control of a Romanian oil rig working in its Persian Gulf waters this morning one week after the Iranian government accused the European drilling company of hijacking another rig. An Iranian naval vessel fired on the rig owned by Romania's Grup Servicii Petroliere (GSP) in the Salman field and took control of its radio room, a Grup's representative in the United Arab Emirates said. Iran, which holds the world's second-largest oil and gas reserves, is due to respond to a European Union-led offer of incentives aimed at persuading it to halt uranium enrichment activities that are crucial to its nuclear program. Neither the press office of Iran's oil ministry nor the one of Iran's revolutionary guards could be reached for comment when called.