At least three French nationals were kidnapped in Yemen Sunday by armed tribesmen, security officials said. The officials, speaking on condition of anonymity because they were not authorized to speak to the media, said tribesmen from the al-Abdullah tribe kidnapped the French nationals in the Shabwa province in southeastern Yemen. The officials said the kidnapped French nationals were in a convoy of foreign tourists when armed gunmen blocked the vehicle they were in and took them hostage. Elderly tribesmen began mediation efforts with the kidnappers, but it was not immediately clear what demands, if any, the abductors had. The French Embassy had no immediate comment.