U.S. said to annul Snowden's passport; leaker said set to fly to Cuba MOSCOW, June 24 (UPI) -- The U.S. passport of admitted National Security Agency secrets leaker Edward Snowden was revoked amid reports he was booked to fly to Havana from Moscow Monday. The U.S. government canceled his passport, The Washington Post reported, as U.S. authorities sought to catch the fugitive before he reached what supporters said was his next goal -- political asylum in Ecuador. U.S. diplomats and law enforcement officials warned countries in Latin America not to harbor Snowden or allow him to pass through to other destinations. The State Department, which issues and oversees U.S. passports, had no direct comment on the Post report. But spokeswoman Jennifer Psaki said in a statement, "Persons wanted on felony charges, such as Mr. Snowden, should not be allowed to proceed in any further international travel other than is necessary to return him to the United States." The State Department may deny or revoke U.S. passports for foreign policy or national security reasons, the U.S. Supreme Court ruled in 1981, supporting the Passport Act of 1926. The Obama administration has charged Snowden with theft of U.S. government property, unauthorized communication of national defense information and willful communication of classified communications intelligence information. The last two charges are espionage-related. It was not immediately clear if his lack of a valid passport would prevent his reported travel plans. The Post said Snowden's passport was invalidated Saturday, but he still managed to fly on a commercial jet to Moscow from Hong Kong Sunday, even after Washington asked Hong Kong to arrest Snowden in anticipation of extradition. Hong Kong, a special administrative region of China, said after Snowden was already flying to Moscow the U.S. request was "insufficient" -- a finding the U.S. Justice Department said Washington found "particularly troubling." Hong Kong -- where Snowden went public as the source of published disclosures about classified national security program -- is generally viewed as friendly to U.S. extradition requests, The Wall Street Journal said. U.S. officials maintained the request was complete and included all information needed to arrest and extradite Snowden to the United States. Anti-secrecy group WikiLeaks said it helped Snowden in his escape to Moscow and helped arrange special refugee travel documents from Ecuador. Ecuador has been helping WikiLeaks founder Julian Assange avoid prosecution by letting him stay at its embassy in London since June 19, 2012. Snowden is "bound for the Republic of Ecuador via a safe route for the purposes of asylum," WikiLeaks said in a statement. Russia's non-governmental Interfax News Agency said Snowden could continue on his journey from Moscow without a U.S. passport if the country where he was seeking asylum provided him with travel documents. Those documents could include affirmation of refugee status, or even a passport from the destination country, Interfax said, citing a Russian law enforcement source. The news agency said Snowden was booked on a Russian airline Aeroflot flight to Cuba. Aeroflot has no direct flights to Ecuador. The only Aeroflot flight to Havana Monday was to leave Moscow's Sheremetyevo International Airport at 2:05 p.m. (7:05 a.m. EDT) and arrive non-stop in Havana at 6:45 p.m. EDT, a United Press International check of the Aeroflot website indicated. Aeroflot has a direct flight to Quito, Ecuador, from Havana to Quito on Fridays. A Sheremetyevo airport spokeswoman told the Journal Snowden spent the night in the airport's "transit zone," where passengers await connecting flights to other countries. Passengers arriving in Moscow from abroad don't need a Russian visa if they are booked on a connecting flight and stay within the transit zone. Russian media said Snowden was in a hotel inside the transit area after undergoing a medical exam. U.S. Sen. Chuck Schumer, D-N.Y., criticized Russian President Vladimir Putin for "aiding and abetting" Snowden's travel to Moscow. "That's not how allies should treat one another, and I think it will have serious consequences for the United States-Russia relationship," Schumer told CNN's "State of the Union" Sunday. Schumer said he also suspected China had a hand in letting Snowden leave Hong Kong -- a suspicion The New York Times confirmed later Sunday was true. Sen. Lindsey Graham, R-S.C., said Snowden's choice of countries for support undercut his claims to be defending privacy and freedom. "The freedom trail is not exactly China, Russia, Cuba, Venezuela," he told "Fox News Sunday." "So I hope we'll chase him to the ends of the earth, bring him to justice and let the Russians know there will be consequences if they harbor this guy," he said. The Kremlin said it had "nothing to do with" Snowden's activities in Moscow. I am not in charge of tickets. I don't approve or disapprove plane tickets. We're not the proper people to address this question to," Putin spokesman Dmitri Peskov told The New York Times. Ecuadorean Foreign Minister Ricardo Patino said in a Twitter message his government "received an asylum request from Edward Snowden." He said he would hold a news conference Monday.