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 ' CNN 's Catherine E. Shoichet and Marilia Brocchetto contributed to this report . 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 . Comment: