Diplomats and political analysts say that the participation of the two ex-presidents Vieira and Ialá may exacerbate tensions among ethnic groups and the military that could destabilize the country. Ex-President Vieira has a troubled relationship with the armed forces. Ex-President Ialá, on the other hand, has a very poor reputation among potential donor countries and financial institutions, with the International Monetary Fund and World Bank freezing aid to the country during his presidency. He has a considerable amount of support from the Balanta ethnic group which dominates the military, but has little support from the other groups. There are unconfirmed reports of the establishment of armed groups along ethnic lines in Bissau.