Mexican environmentalist Adán Vez Lira , who organized several ecologic events and opposed mining companies , was shot dead on April 8 in northern Veracruz .
According to official police sources, the activist was found dead at La Mancha , Actopan .
Adán Vez, the organizer of the Birds and Wetlands Festival and the Procession for Ecology , was part of environmental groups that have opposed the operation of open-pit mines in Actopan and Alto Lucero.
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Officials from Veracruz Attorney General's Office went to the area to open the investigation but so far, there is not an official statement from the state government.
Several NGOs have demanded justice for Adán Vez Lira.
Four more inside a van
The bodies of four people , three men and one woman, were found abandoned inside a vehicle in northern Veracruz .
The events took place on Wednesday in the Papantla municipality, where a five-member family, including two children, was murdered last week.
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The victims were muzzled and had signs of torture and bullet wounds.
Experts from Veracruz Attorney General's Office visited the area in order to gather evidence and begin the investigation.
Last Friday, a five-member family was shot dead inside their home in the same municipality.
The events took place in Papantla , where armed men broke into the house and killed four women and one man.
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