NSW Police have announced three $100,000 rewards for information on the disappearance of two gay men and the death of another in Sydney's east during the 1980s.
The body of John Russell, 31, was found at the bottom of a cliff top at Marks Park in Tamarama on November 24, 1989.
The barman who worked in the eastern suburbs was last seen alive drinking with friends at a hotel in Bondi the previous day.
Ross Warren, 24, a news presenter from Wollongong, also disappeared the same year.
He was last seen driving along Oxford Street, Darlinghurst, on July 22, 1989 after socialising with friends.
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His keys were found two days later on rocks below the cliff top at Marks Park and his car was located nearby. His body has never been found but a coronial inquest found he was deceased.
Police are also seeking information on 27-year-old French national Giles Mattaini, who was last seen by a neighbour walking on the coast track at Tamarama on September 15, 1985.
He was not reported missing until 2002, with the NSW coroner later finding he was also deceased.
Police say the Homicide Squad's Unsolved Homicide Team have been reviewing the three incidents in recent years, based on the coroner's findings that they were possibly the result of gay hate-related crimes.
The rewards of up to $100,000 each are for information which leads to the arrest and conviction of the person or people responsible for the deaths of the three men.
"We will follow up each and every piece of information that is provided to us," Homicide Squad Commander, Detective Superintendent Michael Willing said in a statement on Tuesday.
Speaking on behalf of the families of Mr Warren and Mr Russell, Peter Rolfe from the Survivors After Murder support group said they had been "haunted by the deaths of Ross, John and Giles".
"We would implore you to take advantage of the rewards being offered, so that not only may our haunting be resolved but in some small way, your haunting may also be relieved," he said.
