The Guardian and the Washington Post have been awarded the highest accolade in US journalism, winning the Pulitzer prize for public service for their groundbreaking articles on the National Security Agency's surveillance activities based on the leaks of Edward Snowden.

The award, announced in New York on Monday, comes 10 months after the Guardian published the first report based on the leaks from Snowden, revealing the agency's bulk collection of US citizens' phone records.

In the series of articles that ensued, teams of journalists at the Guardian and the Washington Post published the most substantial disclosures of US government secrets since the Pentagon Papers on the Vietnam war in 1971.

The Pulitzer committee praised the Guardian for its "revelation of widespread secret surveillance by the National Security Agency, helping through aggressive reporting to spark a debate about the relationship between the government and the public over issues of security and privacy".

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