At least 13 people have been killed and more than 20 others injured in a bomb explosion in western Colombia.
According to media reports, the explosion occurred on the Pan-American Highway in the Cauca region, and the bomb was planted in a sewer that exploded as a bus passed by.
The attack is said to be the continuation of a series of attacks against military bases and police stations in the country.
Some reports had initially reported fewer casualties, but the final death toll has increased to 13.
