salam,
I want to shares something about how some people suicide,I know you all wrote about the method of suicide but not all people know suicidal choose stay in their car and burn their car. Then, their died in the car.This tragedy always happened in Japan. Now, in Japan case of suicide is increase from day to day.Many case of suicide in Japan is cause about economic problem and stress because of work.

But is very different in India,.In India people suicide because of religion or because force from their family to make some ritual in their religion. So they need to sacrifice themselves to do the ritual.