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Senate Intelligence Committee Chairwoman Dianne Feinstein (D-Calif.) warned Sunday that Edward Snowden could be carrying a trove of classified information as he meets with Russian authorities.

“We need to know exactly what he has. He could have a lot, lot more. It may really put people in jeopardy,” Feinstein said on CBS’s “Face the Nation.”

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“The only thing I’ve learned is that he could have over 200 separate items,” she added. “That’s been relayed to me.”

Feinstein said the principle damage caused by Snowden was to reveal the existence of a classified program that she said has worked well and disrupted terrorist plots against the United States.

Snowden landed in Moscow on Sunday and could be headed to Cuba, Venezuela or Ecuador, countries with various degrees of hostile relations with the United States.

Russian officials whisked Snowden off in a car shortly after his plane landed in Moscow.

Feinstein said she was surprised that local authorities let Snowden leave Hong Kong despite an extradition request from the United States.

Feinstein said that Snowden’s travel had been aided and abetted, possibly by the WikiLeaks organization, and added she heard a rumor that Snowden is traveling with a companion.

WikiLeaks in a statement Sunday claimed they were aiding Snowden’s efforts to find “political asylum” and were providing him with legal advisers.

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