A bomb on the Pan-American Highway in western Colombia: 13 dead, 17 injured. A dissident FARC faction - the guerrilla organisation that rejected the peace agreements - carried out the attack in the Cauca region, 35 kilometres from Popayán.

Cauca's governor called for urgent help: Cauca cannot face this terrorism alone. A message directed at Bogotá, where President Gustavo Petro - a former guerrilla - is pursuing a policy of total peace through negotiations and ceasefires with various armed groups. The same groups that are killing.

The paradox of Petro's policy is visible: the country is negotiating with groups that are simultaneously carrying out attacks. This is not specific to Colombia - it is the nature of peace processes with fragmented armed movements, where not every faction is under the control of the negotiating body. Part of FARC signed a peace agreement in 2016. Part did not. That part killed 13 people today.