Al-Qaeda\'s north African branch has released a video purporting to show seven Westerners the group kidnapped in west Africa, the Mauritanian news agency ANI reported on Monday. The hostages are four Frenchmen kidnapped from a uranium compound in northern Niger exactly three years ago along with Dutchman, a Swede and a South African who were abducted from Timbuktu in northern Mali in November 2011, ANI said.