HOMICIDE detectives are investigating two possible murders overnight, with two bodies found in what appears to be separate incidents. In the first incident, police and paramedics were called to a Fairfield park on Vine St where they located a man lying dead in the middle of the oval about 4.15am. A NSW Police spokesman said the man, who has not been formally identified by police, is believed to have sustained a number of injuries and the death was being treated as ``suspicious. A crime scene has been established. In the second incident, the body of a man was located in the yard of a factory in an industrial estate in Dunheved, in Sydney's west. A post mortem will be required to formally establish how the man died but it is also being treated as suspicious. He has not yet been formally identified but police said he was an employee of the factory and appeared to have stab wounds. Superintendent Ray Filewood from St Marys LAC confirmed the victim and his attacker knew each other and that the workplace was a factor in the stabbing. The 65 year old was stabbed in the upper torso. "The nature of it is quite horrific, the injuries received," said Supt Filewood. We are appealing to anyone that has knowledge to come forward and contact Crime Stoppers or go to their nearest police station. Police have a number of positive leads and have interviewed a number of people, including factory employees. It is also possible they may use CCTV footage taken from the factory's cameras. Investigations into both matters have commenced.