The British government has issued an alert to airlines around the world, urging them not to allow former U.S. intelligence contractor Edward Snowden to board flights to the United Kingdom.

Graffiti that is sympathetic to NSA leaker Edward Snowden is seen stenciled on a San Francisco sidewalk (Justin Sullivan/Getty Images)

Snowden revealed documents about U.S. secret surveillance programs after fleeing to Hong Kong.

Meanwhile, a popular Communist Party-backed Newspaper in China says China's leadership should let Snowden stay, so he can provide the Chinese with more information.

The Global Times newspaper said in an editorial Friday that the Chinese government should not only consider Beijing's relations with the United States but also domestic public opinion, which the paper says would be unhappy if Snowden were sent back.

The Chinese paper known for nationalist views says Snowden could offer intelligence that can help China update its understanding of cyberspace.

Snowden alleged in an interview with a Hong Kong newspaper that the U.S. National Security Agency's 61,000 hacking targets around the world include hundreds in Hong Kong and mainland China.

(Copyright 2013 The Associated Press. All Rights Reserved)