Argentina ? A former Bosnia Serb paramilitary leader, wanted by a U.N. tribunal on charges of crimes against humanity, was captured Monday in Argentina, officials said.

Milan Lukic, who was indicted in The Hague, Netherlands, in 2000 in connection with a string of notorious killings dating to the Bosnian war, was awaiting initial questioning after his arrest here, authorities said.

Earlier this year, a Serbian court sentenced Lukic in absentia to 20 years in prison for his role in the abduction of 16 Muslims from a bus in eastern Serbia in 1992.

Lukic, as a reputed member of a notorious paramilitary group called the Avengers, allegedly took part in the abduction of 15 Muslim men and a woman who were later taken to Bosnia, tortured at a hotel, executed and their bodies dumped in the Drina River.

Argentine police did not provide details of the arrest, which was first disclosed by Serbian authorities after reports began circulating in Belgrade. Lukic had been missing since the late 1990s.