WATERTOWN, Mass. --
A man was found dead in a car containing poisonous gas on Arsenal Street in Watertown Saturday afternoon, our news partner at the Watertown Tab reported.
According to Watertown police, the death is a suicide. It "does not appear to be suspicious," a spokeswoman from the Middlesex District Attorney's office said.
According to police reports, a couple walking their dog along the bike path near 500 Arsenal St. at about 5:50 p.m., noticed a gray Honda Accord in a parking lot.
The car reportedly had two notes on the window -- one saying "Poison H2S gas" and one saying "One breath kills, notify Hazmat."
Police officers and firefighters responded to the scene and notified the state Hazmat team. The man's identity has not been released.
Officials have not confirmed the cause of death. "H2S" is the chemical composition of hydrogen sulfide, an extremely poisonous gas.
Other people have used the gas for suicide while warning discoverers of the danger, according to reports from ABC-TV and Wired Magazine.
Two weeks ago, police responded to a Somerville house where a man had reportedly put a note on his bathroom door saying there was poison inside.
They reportedly found a man with a bucket of an unidentified poison in the bathtub. The man died a week later, but his cause of death has not yet been released.
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