Representatives of the movements Coalition Against Impunity (CCI), Lenca Indigenous People Coordinator, and La Paz Farmers urged authorities to find those responsible.
"There must be justice for Vasquez. Authorities must hold a prompt and effective investigation, so perpetrators don't go unpunished," the joint declaration, which was also signed by the People's Justice Office, demanded.
On Saturday, armed individuals wearing ski masks entered Vasquez's home in the Ocotal village, in Santiago de Puringla municipality, La Paz Department. He was shot dead in front of his children, some of whom were minors.
United Nations High Commissioner for Human Rights (OHCHR) in Honduras also condemned the crime against a renowned human rights defender.
"The violent incident reminds us of the unacceptable risk faced by human rights, land, and territory defenders," the OHCHR stated as it urged the government to recognize the activists' work for democracy.
Honduras, which reported eight killings of human rights defenders in 2020, is one of the most dangerous countries for environmental and social activists.