An ex-US Marine who had suffered from depression and once tweeted about killing “everyone I see” opened fire in camouflage gear at a supermarket, gunning down two co-workers before killing himself.

A supermarket employee wearing military clothing opened fire at the store early today, killing two of his colleagues then himself.

Lawyers for one of the two US University students accused of secretly webcasting the sex life of a fellow freshman who later committed suicide said their client is innocent.