There is no evidence to indicate that Colombia’s largest rebel group FARC is behind the May 15 attack on a former minister in Bogota, the country’s chief prosecutor said Friday.

Prosecutor General Eduardo Montealegre said in a press conference that for prosecutors it remained uncertain whether the bomb attack on former Interior Minister Fernando Londoño was carried out by leftist groups like the FARC or illegal armed groups belonging to the extreme right.

The car bomb that was defused on the same day of the attack was the FARC’s responsibility, said Montealegre.

Londoño, his political ally former President Alvaro Uribe and the Police have attributed the attack to the guerrilla group.

The national government lead by President Juan Manuel Santos has condemned the attack, but said it wants to wait for investigators before drawing conclusions about the perpetrators of the attack that killed two.

From Colombia Reports