A U.N. court convicted former Bosnian Serb leader Radovan Karadzic of genocide and nine other charges Thursday and sentenced him to 40 years in prison for orchestrating Serb atrocities throughout Bosnia's 1992-95 war that left 100,000 people dead.

As he sat down after hearing his sentence, Karadzic slumped slightly in his chair, but showed little emotion.

The U.N. court found Karadzic guilty of genocide in the 1995 Srebrenica massacre in which 8,000 Muslim men and boys were slaughtered in Europe's worst mass murder since the Holocaust.

Presiding Judge O-Gon Kwon said Karadzic was the only person in the Bosnian Serb leadership with the power to halt the genocide.

In a carefully planned operation, Serb forces transported Muslim men to sites around the Srebrenica enclave in eastern Bosnia and gunned them down before dumping their bodies into mass graves.

Kwon said Karadzic and his military commander, Gen. Ratko Mladic, intended "that every able-bodied Bosnian Muslim male from Srebrenica be killed."

Karadzic was also held criminally responsible for murder, attacking civilians and terror for overseeing the deadly 44-month siege of the Bosnian capital, Sarajevo, during the war and for taking hostage U.N. peacekeepers.

However, the court acquitted Karadzic in a second genocide charge, for a campaign to drive Bosnian Muslims and Croats out of villages claimed by Serb forces.