| Guerima, a village carved out of the Amazonian rainforest in eastern Colombia, once used to live almost exclusively on coca production |
A report on Colombia by the UN High Commissioner for Human Rights says dozens of rights activists have been killed last year.
| According to the White House, coca cultivation in Colombia surged last year |
Under a peace deal signed in November, the Farc rebels have moved to transition zones where they will remain until they fully demobilise.
| Drug traffickers often see rights activists as a threat |
The UN said the illegal armed groups were fighting for territory and resources. The UN representative in Colombia, Todd Howland, said the groups were often involved in drug trafficking and illegal gold mining and see activists as a threat.
Mr Howland called on the government to recognise that the deaths formed a pattern and to provide protection to those in danger.
Colombia's Interior Minister Juan Fernando Cristo, said violence against rights defenders could undermine the peace deal.
"We're all interested in facing these threats and these murders because we know that it seriously affects the chances of consolidating peace in Colombia," he said.