NEW : 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 deaths ' It 's too early to deny a massacre took place , activists say . Comment:
NEW : 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 deaths ' It 's too early to deny a massacre took place , activists say . Indigenous groups say only three survivors have been found from a community of about 80 .