Iranian troops repulsed the latest of a series of Iraqi attacks against their positions on the oil-rich Majnoon Islands in southeast Iraq, Tehran radio reported. “They didn’t capture even one bunker,” Tehran radio said. Iraq used troop-carrying boats in launching the assault through reed-bed canals around the islands, the radio said. There was no independent confirmation of the battle accounts. Iran captured the islands two years ago, and Iraq has mounted several recent counterattacks.