Story highlights Former NSA contractor Edward Snowden has been in Russia since 2013

His supporters have petitioned President Barack Obama to pardon him

(CNN) Edward Snowden's leave to remain in Russia has been extended until 2020, Russia's Foreign Ministry spokeswoman Maria Zakharova has confirmed to CNN.

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.

On Tuesday, Zakharova announced an extension of a "couple of years" in a Facebook post that criticized former CIA acting director Michael Morell for an opinion piece he wrote suggesting that Russian President Vladimir Putin should consider returning Snowden to the United States as "the perfect inauguration gift" to President-elect Donald Trump.

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.