An Australian nurse admitted Monday to setting an unoccupied bed ablaze to cover an $85 drug theft of Oxycodone and Kapanol from the nursing home at which he was working.

Eleven people were killed in the blaze, which reportedly spread quickly among the absence of proper fire sprinklers. Roger Kingsley Dean, 37, allegedly stole 238 prescription pills from the Quakers Hill Nursing Home in Sydney, Australia. After staff at the home noticed the missing medicine and reported it to police, Dean allegedly took a cigarette lighter and put a flame to some bedsheets in one of the assisted living rooms.

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The bed itself was unoccupied, but the two people who shared the room, Dorothy Sterling and Dorothy Wu, were reportedly bedridden and later perished in the fire. According to the Sydney Morning Herald, Dean decided to allegedly start the fire after he was unable to access the locked room that housed the prescription drug records.

Dean admitted to setting the fire at a New South Wales Supreme Court hearing in Australia on Monday. Eleven people reportedly died either from the fire itself or following the blaze from their fire-related injuries.