Australia's offshore detention policy is under intense scrutiny again after a night of violence at the Manus Island centre left one asylum-seeker dead, another with a fractured skull and at least 75 others injured, 13 of them seriously.
Detainees told refugee advocates they were attacked by armed gangs of police and locals who stormed the facility in Papua New Guinea, wielding guns, knives, sticks and machetes.
But Scott Morrison, the Australian Immigration Minister, rejected those claims, saying trouble erupted after asylum-seekers broke out of the centre.
The conflicting accounts of events late on Monday and early yesterday left key questions unanswered - in particular, who carried out the attacks, in or outside the centre; and how can the safety of those sent there for processing be guaranteed in the future? What seems undisputed is that tensions had been rising for weeks at the remote facility.
Just 24 hours before this latest and most serious incident, detainees tore down fences and smashed bunk beds during a riot which saw 35 people escape and 19 treated for injuries.