The case is a tragedy, but a doctor says it solved a long unanswered question - what does the deadly poison cyanide taste like?

An Indian man who committed suicide left a hastily scrawled note describing the taste of the fatal toxin, the Hindustan Times newspaper reported on Saturday.

"Doctors, potassium cyanide. I have tasted it. It burns the tongue and tastes acrid," he wrote, according to the paper.