LA PAZ, Bolivia -- An emotionally disturbed farmer wielding a kitchen knife went on a rampage in the terminal of the La Paz international airport Thursday, stabbing 11 people, authorities said.

Hospital officials said most of the wounds did not appear to be life-threatening although eight of the victims were hospitalized. They said one woman had surgery for an abdominal wound and another had a punctured liver. Among the wounded was the police lieutenant who detained the man.

Deputy Interior Minister Jorge Perez said the attacker told police he "heard voices" and went on the attack to defend himself.

"The man arrived from a village. He is mentally ill and he approached a ticket sales counter and began to attack" passengers who had lined up to board local flights, said Perez.

Police identified the attacker as Javier Virgilio Cusi, a 41-year-old ethnic Aymara from the highlands town of Santa Rosa.

"The man has mental problems. He gives incoherent accounts. He says he confused his victims with hens," police commander Adolfo Cardenas said.

All of the victims were Bolivians, and most were female passengers, officials said.

One of the wounded told PAT television that the attacker struck many victims in the back.

Cusi's court-appointed lawyer, Monica Irusta, said that he had been undergoing psychiatric treatment and that a psychological exam had been ordered.

She said his declarations were incoherent. At one point, she added, Cusi said he went to the airport to meet with God. At another, he said he went to sell domestic animals, she said.