Members of Grupo Colina, a death squad comprising Peruvian Armed Forces personnel, were later identified as the assailants who killed fifteen individuals, including an eight-year-old child, and injured four others.

In August 2001, following a ruling by the Inter-American Court of Human Rights, the Peruvian government agreed to pay $3.3 million in compensation to the victims and their families.

For more than a decade, they had committed acts of terrorism against government officials, community leaders and innocent bystanders: assassinations, car bombings and other violence.

[citation needed] Judicial investigations and newspaper reports revealed that those involved worked for military intelligence; they were members of the Grupo Colina, which was known for conducting an anti-terrorist program including direct attacks on suspects.

26479, which granted a general amnesty to all those members of the security forces and civilians who were the subject of a complaint, investigation, indictment, trial or conviction, or who were serving prison sentences, for human rights violations committed after May 1980.

[citation needed] In May 1993, and again in January 1995, some officers from the Peruvian army stated publicly that members of Grupo Colina were responsible for the Barrios Altos massacre.

[citation needed] The officers also stated that the head of the Joint Command of the Armed Forces and of the National Intelligence Service (SIN) had full knowledge of the massacre.

Established in 1979 by the Organization of American States (OAS), the court made its judgment of 14 March 2001, finding that the government was in the wrong and ordering compensation be paid to the victims.

[5][6] As a result of the August 2001 ruling of the Inter-American Court of Human Rights of the OAS, which had heard the case, the government of Peru agreed to pay USD $3.3 million in compensation to the four survivors and the relatives of the fifteen people murdered.

On 13 September 2001, Supreme Court Justice José Luis Lecaros issued an international warrant to Interpol for the arrest of Fujimori, then living in Japan.