Yemen dispatched troops yesterday to force the release of four French tourists kidnapped by armed tribesmen on Sunday, a Yemeni official said. "At least 12 military vehicles are on their way to arrest the kidnappers and to free the four tourists," said Naser Al-Khudur, deputy governor of the southeastern province of Shabwa. However, Khudur said negotiations to secure their release were still on track. "We can say there is a new development in the negotiations with the captors, they are young Yemeni men and they will listen to elders and the sheikhs (leaders) of their tribe."Armed Yemeni tribesmen kidnapped the tourists in the east of the Arab country on Sunday to press for their relatives to be released from jail, Yemeni and French officials said.