UNITED NATIONS - The U.N. Security Council unanimously voted Saturday to impose new sanctions against Iran for its refusal to stop enriching uranium

The moderately tougher sanctions include banning Iranian arms exports, and freezing the assets of 28 people and organizations involved in Iran's nuclear and missile programs.

Iranian Foreign Minister Manouchehr Mottaki rejected the sanctions and said Iran had no intention of suspending its enrichment program.

"Suspension is neither an option nor a solution."

Raising tensions, Iran detained 15 British sailors and marines Friday in what it said were Iranian territorial waters near Iraq.

Iran responded to the first set of sanctions in December by expanding enrichment.

It asks the International Atomic Energy Agency to report back in 60 days on whether Iran has suspended enrichment and warns Iran could face further measures if it does not.