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BOGOTA, Colombia (AP) _ Members of a right-wing paramilitary group raided a Colombian village early Sunday and killed at least 11 people, authorities said.

National Police spokeswoman Jenny Alvarado said up to 15 people may have been executed in the early morning massacre near the township of Falan, some 74 miles west of the capital, Bogota.

Fighters from the United Self-Defense Forces of Colombia, or AUC, killed the villagers after accusing them of working with leftist guerrillas, said Tolima Police Col. Ciro Chitiva.

Authorities from the attorney general's office and the government's human rights office were heading to the region in Tolima state to investigate. Police said four people were badly injured in the massacre.

The U.S. State Department last week placed the 8,000-strong AUC on its list of worldwide terrorist organizations. Two leftist rebel armies in Colombia are also included in the list of 31 terrorist groups.

The AUC is waging a brutal massacre and assassination campaign against the guerrillas and those suspected of sympathizing with them.

Sunday's massacre is one the largest slayings committed by the AUC since the emergence of its new leader, Salvatore Mancuso. Even though the AUC is blamed for most of the human rights abuses committed in Colombia, Mancuso said in a recent interview that his fighters don't kill innocent people.

At least 3,000 civilians die every year in the South American country's 37-year-old conflict.