SARAJEVO - US authorities on Tuesday extradited to Bosnia a Muslim ex-soldier accused of taking part in the mass murder of Croat civilians in southern Bosnia-Herzegovina during the Muslim-Croat conflict there in 1993, Bosnia's prosecutor's office said.

Edin Dzeko, a 39-year-old naturalized US citizen who moved to the United States in 2001, agreed in November before a judge in Seattle to return to his native Bosnia to face charges that he participated in war crimes.

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"Defendant Edin Dzeko was deported from the United States and handed over to Bosnia-Herzegovina authorities on Dec. 20," the prosecutor's office said in a statement. Dzeko was placed in detention and would be handed over to a war crimes prosecutor.

Dzeko was investigated for crimes he allegedly committed as a member of the Bosnian army special unit known as "Zulfikar", the statement said.