MOSCOW  A prominent opposition journalist in Kyrgyzstan, whose autocratic president has been courted by the United States as an ally for the war in Afghanistan, died on Tuesday after being thrown last week from a sixth-story window, his arms and legs bound with duct tape.

The journalist, Gennadi Pavlyuk, was on a business trip in Almaty, the commercial capital of neighboring Kazakhstan, when he was attacked on Dec. 16, the authorities said. He was in a coma before dying of severe trauma on Tuesday. His colleagues said he was 40 years old, with a wife and son.

Opposition politicians in Kyrgyzstan blamed the Kyrgyz president, Kurmanbek Bakiyev, for the killing, saying that he was escalating his efforts to eliminate dissent in the country. Mr. Bakiyev’s spokesman said the government had nothing to do with the attack on Mr. Pavlyuk.

Since taking power in 2005, Mr. Bakiyev has steadily tightened his grip on Kyrgyzstan, a poor former Soviet republic in the mountains of Central Asia, and in recent years, numerous opposition leaders and journalists have been attacked. Some have died, and rarely if ever has anyone been held accountable.