British police on Tuesday said three suspects believed to be involved in the stabbing of an Iranian journalist working for a Farsi-language media outlet in London left the country within hours of the attack. UK-based Iranian journalist Pouria Zeraati from broadcaster Iran International was stabbed outside his home in London last week, in what has been regarded as the latest state-sponsored attempt to intimidate Iranian nationals living outside the country. Zeraati hosts a television show which is critical of the Iran’s government, heading by Supreme Leader Ayatollah Ali Khamenei. Iran Internat…