A wave of explosions rocked southwest Colombia on Tuesday morning, authorities said, killing at least seven people in an attack believed to be targeting the country’s police.

The serial bombing attack near police stations came a few days after Colombia’s presidential candidate and Senator Miguel Uribe was shot in his head during a campaign rally.

At least four people have died in a wave of bomb and gun attacks in south-western Colombia, according to local media reports. Two police officers were said to be among those killed in the attacks, which targeted Cali, the country's third-largest city, and several nearby towns.

With a high-profile political assassination attempt over the weekend, is Colombia getting any closer to “total peace”?

Colombian President Gustavo Petro condemned attack against a political rival. Stefano Pozzebon reports from Bogota.