Colombians recently had a rare opportunity to buy a stake in the...Ecopetrol company, but critics complain that it still has questions to answer over its record on human rights and the environment…Human Rights Watch says Ecopetrol…has taken no action to address reports of extrajudicial executions and a massacre committed by state security forces close to their oil installations 10 years ago…Javier Gutierrez, the head of Ecopetrol, says allegations of massacres committed by state security forces close to oil installations are a government matter and nothing to do with his company. Commenting about the environment and recent spillages, he says: "We have very strict regulation at the level of the best in the world."…The pressure group Justice for Colombia says profits should not come before human rights…"There have been about 100 or so members of the national oil workers' union, most of them working for Ecopetrol, who have been assassinated,"…says [the group's director, Mariela Kohon].