More than 400 Uzbek refugees who fled to neighbouring Kyrgyzstan in May when troops quelled an uprising in the eastern Uzbek city of Andizhan will be flown to a third state, Kyrgyz and U.N. officials said on Wednesday. "Relocation is under way. The operation as you can see has started, but we will not be able to disclose the location for their (refugees') travel," Carlos Zaccagnini, head of the U.N. refugee agency's mission in Kyrgyzstan, told Reuters. The Uzbek authorities say 187 people -- mostly "terrorists and extremists" -- were killed in what they say was a terrorist action orchestrated by foreign forces. In Geneva, the Office of the U.N. High Commissioner for Refugees (UNHCR) said it had been worried about 29 people still held near the Uzbek border who were due to join the exodus. Uzbek forces near the camp at the Kyrgyz border town of Osh had apparently demanded the return of 12 of the group, which Uzbekistan says is made up of criminals who escaped from jail during the May incidents, a UNHCR spokeswoman said.