WASHINGTON — Porn mogul Larry Flynt in a full page newspaper ad on Sunday offered $1 million for information about the sexual indiscretions of well-known US politicians or government officials.

Flynt's offer, appearing in the Washington Post newspaper, asked readers to phone their tips to his hotline, or to send an email to a dedicated online address at his "Hustler" porn magazine.

"Do you have information about infidelity, sexual impropriety or corruption concerning a current United States senator, congressperson or prominent government official?" the ad asks in large, bold type.

"Can you provide documented evidence of your claims? Larry Flynt and Hustler Magazine will pay you up to $1 million if we choose to used your material and publish your verified story," the ad said, adding that all correspondence would be kept "strictly confidential."

It is just the latest of the famous porn publisher's sporadic forays into the realm of politics.

Last year he offered disgraced US lawmaker Anthony Weiner a job, after the New York congressman resigned over a tawdry "sexting" scandal.

He also offered a $1 million dollar reward last year for anyone who could produce proof of illicit sexual liaisons by then-presidential contender Rick Perry.

Flynt has fought several prominent legal battles involving the First Amendment -- the right to free speech guaranteed in the US Constitution -- and has unsuccessfully run for public office.

He won a seminal free speech case in 1988 before the US Supreme Court.

That case "Hustler Magazine v. Falwell" came after he was sued by prominent US reverend Jerry Falwell in 1983 over an offensive ad in his porn publication that parodied the televangelist.