A police spokesman said the victims were under 25, including 16, and were chatting in the town’s central square when they were shot.
The local president asked the public force for “greater accompaniment from intelligence, from the foot of force” to face the worst onslaught of armed groups since a historic peace agreement was signed in 2016 with the former guerrillas of the Revolutionary Armed Forces of Colombia (FARC).
This is the second massacre in the last four days in the department of Antioquia, where San Rafael is located.
Last Sunday five people, three of them Venezuelans, died in another armed attack in the municipality of Betania.
Antioquia concentrates 13 of the 77 massacres -or homicides of three or more civilians in one act- committed so far this year throughout Colombia, according to the independent study center Indepaz, quoted by the AFP news agency.
At least 279 people died in these attacks.
Según la ONG Human Rights Watch Colombia registers a number of massacres “similar” to the one before the peace pact that disarmed what was the most powerful guerrilla in the continent at the beginning of 2017, now extinct and turned into a political party.
Although the peace agreement alleviated political violence, some areas are once again under fire from the organizations that finance themselves from drug trafficking and came to replace the former rebels as de facto authorities in the face of the weak presence of the State.

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