CAJIBIO — The death toll from a highway bombing in southwestern Colombia rose to at least 20, with 36 people injured, Cauca regional Governor Octavio Guzman said. The attack occurred near the town of Cajibio.

Guzman said the dead included 15 women and five men. Three of the injured remained in intensive care as of Monday, while five minors who were hurt in the blast were out of danger. A dozen of the victims came from a village near Cajibio.

Hundreds of mourners held a vigil in Cajibio on Monday, dressed in white and waving white sheets or balloons as a sign of peace. The vigil drew attendees from the surrounding area as the community gathered to mark the loss of life.

"Please, no more death, no more violence." Joao Valencia said at the vigil. "These kinds of women should die of old age, not have their lives taken from them in such a tragic way," he added.

Colombian President Gustavo Petro said "a narco-terrorist group" was responsible for the attack. Petro named a group led by Nestor Vera, commonly known as Ivan Mordisco, a dissident former member of the Revolutionary Armed Forces of Colombia, which signed a peace agreement with the government in 2016.

The bombing was one of the deadliest attacks in Colombia since the Revolutionary Armed Forces of Colombia blew up a Bogota nightclub in 2003, killing 36 people. The attack near Cajibio killed 15 women and five men, Guzman said, with a dozen victims from a single village in the area.

Security is a topic in the May 31 presidential election, which will choose a successor to Petro.