( CNN ) -- Government investigators found no proof substantiating reports that miners massacred members of an indigenous community in the Venezuelan Amazon , officials said . But activists and indigenous groups said Monday that the government was too swift in denying that dozens of Yanomami Indians died in an attack that reportedly occurred in July , and that was the subject of a call for action last week by a Yanomami organization and other groups . `` It 's far too early for the Venezuelan government to be denying this massacre took place , '' said Chloe Corbin , a spokeswoman for London-based Survival International . Allegations of the massacre trickled out of a remote region along the Brazil-Venezuela border , where unauthorized Brazilian gold miners have long clashed with indigenous groups . The Yanomami , who live in both nations , are considered the largest indigenous group in the Americas that remains largely untouched by advances in the outside world . Venezuelan officials said last Wednesday they were investigating reports of an attack . On Saturday , a top official said visits to the region revealed that reports about the alleged massacre were false . `` We can tell the country that there is no evidence of any deaths , nor any evidence of homes burned down in the supposed massacre of 80 of our Yanomami brothers , '' Nicia Maldonado , Venezuela 's minister of tribal people , told state-run VTV . On Sunday , the South American country 's interior minister described the allegations as `` false news , '' accusing private media companies and members of the opposition of spreading the report . In a Twitter post , Interior Minister Tareck El Aissami said government investigators had visited all of the Yanomami communities and `` all are well . '' But a group of organizations representing indigenous people and communities in the Amazon said the investigators had n't visited the area where the attack is reported to have taken place . For that reason , the groups said in a statement published on the website of the Venezuelan human rights organization Provea , the authorities ca n't `` say that no evidence proving the alleged massacre has been found . '' They urged the government to continue the investigation and to go as far as site of the settlement that was reportedly attacked . The area is a five-hour helicopter ride , or 15 days on foot , from Puerto Ayacucho , the main Venezuelan city in the Amazon , the government said . Survival International , which advocates tribal peoples ' rights worldwide , said in a written statement that the government officials ' comments are `` not unusual in these circumstances and should be ignored . '' `` There is more that needs to be done on the ground to get to the bottom of this reported massacre and find out how many people were affected by it , '' Corbin said . Indians told members of a neighboring Yanomami community that they saw burned bodies and bones in the area where the attack allegedly occurred , according to Survival International , which had contacted local representatives but had not spoken directly with any witnesses of the alleged attack . Of about 80 Yanomami people who lived in the Irotatheri community , only three survivors had been found , according to a declaration published on Survival International 's website , purportedly from indigenous organizations . In recent years , the Yanomami tribe has been under increasing pressure as miners illegally entered their land in the search of profits . Miners in Brazil have transmitted diseases such as malaria and flu to the Yanomami , who have little resistance to such diseases , observers say . CNN 's Catherine E. Shoichet and Marilia Brocchetto contributed to this report .
Venezuela : Investigators did n't visit the site of the alleged attack , indigenous groups say . A top Venezuelan official says there is ' no evidence of any . ' It 's too early to deny a massacre took place , activists say . Indigenous groups say only three survivors have been found from a group of about 80 .