Iran has dismissed US sanctions on several of its officials, saying they were a sign of the complete inefficiency of Washington's previous sanctions on the country. "Washington's fruitless and repetitive sanctions against Iranian officials is a sign of weakness, despair and confusion of the US administration," state TV quoted Iran's Foreign Ministry spokesman Abbas Mousavi as saying on Thursday. On Wednesday, the United States imposed sanctions on several Iranian authorities, including its interior minister, accusing them of engaging in serious cases of human rights abuse. The US Treasury Department said Interior Minister...