Uzbek authorities have arrested an opposition leader on embezzlement charges, the Interior Ministry said Monday, after he pushed for the easing of autocratic rule.
Sanjar Umarov, chairman of the Sunshine Coalition, was arrested for "the theft of millions and embezzlement," the ministry said.
Umarov, a wealthy businessman-turned-politician, was detained on Saturday, the Fergana.ru Web site said.
In the letter, the coalition expressed its intention to look for a resolution of the political crisis in Uzbekistan, and called for stronger integration and economic ties with Russia.
The Sunshine Coalition was formed in April in the wake of the revolution in neighboring Kyrgyzstan that ousted President Askar Akayev. It gained prominence in May for denouncing the brutal quelling of a popular uprising in the eastern Uzbek city of Andijan.
Rights groups said Uzbek troops fired on unarmed protesters, killing more than 700 people. The government contends the uprising was encouraged by Islamic extremists, and puts the death toll at 187.
Umarov, a former scientist with a doctorate in physics, made his fortune in the cotton, oil and telecommunications businesses, and reportedly has strong business ties to the West. His wife and five children live in the United States, reports the AP.