The US Central Intelligence Agency had "full knowledge" of the deadly Colombian raid in March on a Farc rebel camp inside Ecuador that led to a rupture in ties between Bogota and Quito, Ecuador's Defence Minister Javier Ponce said on Thursday.

The CIA "had full knowledge of what was happening in Angostura," the border area in Ecuador where the attack took place, Ponce said while presenting the results of an official investigation into the suspected infiltration of Ecuador's armed forces by US intelligence agents.

Investigators "even detected a call by the CIA on the morning of 1 March announcing the attack in Angostura," the minister added.

In April, Ecuador's leftist President Rafael Correa sacked his defence minister and police chief after alleging the CIA had infiltrated his country's security apparatus to help US ally Colombia.

The raid on the camp of the Marxist Revolutionary Armed Forces of Colombia (Farc) killed more than 20 people, including Farc's number-two guerrilla Raul Reyes, four Mexicans and an Ecuadoran.

A diplomatic standoff quickly ensued, with Quito expelling Bogota's ambassador on 3 March and both sides ordering thousands of troops to their common border.

While military tensions have eased, diplomatic relations between the neighbours have yet to be normalised.

The Farc is Latin America's oldest and most powerful insurgency, and has been trying to topple the Bogota government since the 1960s.

AFP