The Guatemalan government declares a "state of siege" after 29 peasants are massacred.El gobierno de Guatemala declara el "estado de sitio" después de 29 campesinos son masacrados.Guatemala's President Alvaro Colom has declared a "state of siege" in a northern border province, ordering in the military after police found 29 migrant workers brutally killed on a farm over the weekend. Colom, in a televised address late Monday, promised to challenge the drug dealers authorities believe are responsible for the killings, which have been described as a "massacre" by the state-run Guatemalan News Agency. "Despite the few resources we have, even with the lack of military personnel, we will still come face to face with organized crime," he said. One man was captured and two were killed during a shoot-out between suspected drug-runners and police, Colom said. The killing spree, which officials said took place late Saturday into early Sunday, is one of the nation's worst since the end of the civil war in 1996. The killers -- believed to be members of Mexico's Zeta drug cartel -- decapitated several victims and left their body parts strewn across the terrain, police said.