Colombia’s anti-government guerrillas have grown stronger under President Gustavo Petro’s three years in office.

Colombia says it will crack down on armed groups after twin guerrilla attacks – a truck bombing in Cali and the downing of a police helicopter – left 19 people dead.

An attack on a Colombian National Police helicopter and a suspected car bombing near a military air base left at least 19 people dead Thursday in what Colombian authorities are describing as terrorist acts.