Lake Macquarie Police have stumbled across a drug laboratory at Dora Creek during a concern for welfare check.
Police say emergency services were called to a property around 11:30 Monday morning and arrived to find a 36-year-old man unconscious.
Attempts to revive the man failed and he died at the scene.
During investigations, officers discovered a secret drug lab in a shed at the back of the property, as well as an outdoor hydroponic cannabis set-up.
Firearms, explosives and other weapons were also discovered at the scene along with items believed to be drug-making paraphernalia.
Officers dismantled the drug set-ups and examined the weapons.
The man’s death is not being treated as suspicious and inquiries are ongoing.