Australian officials say one asylum seeker was killed and at least 77 wounded during the second riot this week at a detention center in Papua New Guinea.
The case highlights what some activists say are unsafe conditions at the remote camp on Manus Island, where asylum seekers trying to reach Australia are sent for processing.
Australian Immigration Minister Scott Morrison said the unrest began after the would-be refugees were told they would have to be resettled in impoverished Papua New Guinea.
He called the incident a "great tragedy," but blamed the asylum seekers for allegedly trying to escape the facility.
Some rights groups disagree with that narrative. The Refugee Action Committee says local villagers armed with machetes, pipes, sticks and stones stormed the facility and attacked the asylum seekers.
British security contractor G4S, which guards the facility, denied those accusations, saying the asylum seekers did not leave the facility because of attacks by locals.