A bomb attack on a highway in Colombia has killed at least 19 people, according to initial reports, with some sources indicating the death toll may have risen to 20.

The attack occurred as Colombia prepares for presidential elections scheduled for next month. The incident represents an escalation in political violence in the country during the election period.

Details about the specific location of the highway attack, the perpetrators, and the circumstances surrounding the bombing were not immediately available. Colombian authorities have not yet released official statements regarding the investigation.

The timing of the attack, coming ahead of the presidential election, has raised concerns about security conditions in the country during the electoral process.