BOGOTA -- The commander of the rebel unit that kidnapped three U.S.
 Indian-rights activists slain in March was among at least two dozen guerrillas
 killed in an army ambush, authorities said Thursday.

 Still at large, were the rebel superiors who ordered the killings, U.S. and
 Colombian officials said.

 Napoleon Carreno, alias Comandante Rogelio, led the guerrilla cadre that
 abducted Terence Freitas, 24, Ingrid Washinawatok, 41, and Lahe'ena'e Gay, 39,
 on Feb. 25 as they were leaving the U'wa Indian reserve.