By Pablo Barrera
A left-wing activist participating in a protest days before primary elections in Argentina died of a heart attack while being detained by police in the capital Buenos Aires on Thursday.
People at the scene identified the victim as Facundo Molares, a leftist activist who was a member of the Revolutionary Armed Forces of Colombia (FARC) for 15 years and who now worked as a photographer for alternative media.
The protest had been reportedly called by several left-wing groups.
Despite the peace agreement signed by the FARC guerrillas and the government in 2016, violence has intensified in the country.
After the signing of the peace accord, a FARC unit of dissidents said it would not lay down arms and that it would continue fighting.
Argentines will vote on Sunday in the country's presidential primaries with many people angry over triple-digit inflation and rising poverty.