Rebels belonging to the Revolutionary Armed Forces of Colombia (FARC) have killed at least three police officers in the southwestern department of Cauca.
According to the Colombian police, the officers, who were on patrol in the area, were killed after being attacked with explosives and gunfire by the rebels on Thursday.
It was also said that in a separate attack on an electrical tower by the rebels on Wednesday night, the power in the southern department of Caqueta, which is home to 470,000 people, was cut.
Colombian President Juan Manuel Santos described the "terrorist acts” as "incomprehensible".
The incident took place days after the latest round of peace talks between the rebels and the Colombian government in the Cuban capital, Havana, on June 4.
During the peace talks, which initially started in November 2012, the two sides agreed to establish a truth commission to investigate crimes committed throughout the country's half-century conflict.
Both sides agreed that the commission would be “extra-judicial" and its establishment relies only on a final peace deal.
FARC is Latin America’s oldest rebel organization and has been operating against the government since 1964. The rebel group is believed to have around 8,000 fighters operating across a large swathe of the eastern jungles of the Andean country.
The ongoing fighting between government forces and FARC rebels has claimed an estimated 600,000 lives and left more than 4.5 million people displaced, according to the government.
IA/MHB/SS