Manus Island guards, including Darren Powell of G4S, mock asylum seeker's self-harm From Darren Powell's Facebook profile where he mocks a Manus Island detainee who swallowed a pair of nail clippers on Christmas Day. GUARDS at Manus Island processing centre are being investigated after joking about a asylum seeker who swallowed a pair of nail clippers on Christmas day. Darren Powell, who works for private security firm G4S, posted about the nail clipper incident on Facebook, The Guardian reports. Merry Christmas all. One of these jokers just swallowed a pair of nail clippers. A Christmas I shall not easily forget," he said. RALMFAO stands for "rolling around laughing my freaking ass off" (polite version). A number of his colleagues weighed in as well, with many 'liking' the post. "I want to be his escort to the shitter when he passes them," posted Jason Drain, another G4S employee. "Lol so he has finally realised the food is shit," posted Paul Clear, another G4S employee. Powell replied to the thread saying "docs think it may take up to a month" for the asylum seeker to pass the clippers. G4S said it was launching an investigation into the incident. G4S is very concerned by reports of recent inappropriate comments on a social media network. We were not previously aware of these allegations," he said. The health, safety and welfare of all those in our care are our highest priority. "The matter will now be investigated and dealt with appropriately according to company policy and the legal requirements of the market in which they are alleged to have occurred," the security firm said. The news comes after Immigration Minister Scott Morrison talked up the government's improvements and training of service providers at the facility following Guardian Australia's publication of four months of logs of incidents at the Manus centre. The Guardian Australia report found there were 110 incidents including assault, self-harm and voluntary starvation at the Manus Island processing centre over a four-month period in 2013. Documents also include reports of a child asylum seeker threatening to commit suicide, other attempted suicides by detainees as well as riots and hunger strikes. Mr Morrisons spokeswoman said of the latest Facebook incident that it was "completely inappropriate to mock self-harming behaviour."