- Former NSA contractor Edward Snowden has been in Russia since 2013
- His supporters have petitioned President Barack Obama to pardon him
Snowden, a former US National Security Agency contractor, sought asylum in Russia in June 2013 after leaking volumes of information on American intelligence and surveillance operations to the media.
Snowden settled in Moscow after initially traveling to Hong Kong following his 2013 public disclosure of classified information. The Russian government granted him asylum soon after.
In August 2014, Snowden received a three-year extension to his leave to remain in Russia. That extension was due to expire this year.
However, the White House said Tuesday that Snowden had not submitted official documents requesting clemency. He is accused of espionage and theft of government property.