Political violence has escalated in Colombia ahead of next month's presidential election.

The roadside bomb exploded in southwestern Colombia in a surge of violence blamed on FARC dissidents just weeks before the country's presidential election.

Political violence has escalated in Colombia ahead of next month's presidential election.

Explosive attack on a bus in Colombia kills 13 and injures 38, highlighting escalating violence linked to drug trafficking.

Dissident Farc faction blamed for attack on Pan-American Highway that also injured 36 people in south-western region