Simon Magal and Jakub Skrzypski were arrested separately in August in Papua and police allege they were involved with an armed pro-independence group.
Vanuatu's representative to the UN, Noah Kouback, told a working group meeting on arbitrary detention and involuntary disappearances last week the charges were questionable.
"Vanuatu notes with concern raised the working group on indigenous population's failure to respond to its request for a visit, so we call on Indonesia to allow the UN special mechanism to ... and to report on the systemic ongoing problem."
