Senate Intelligence Committee Chairwoman Dianne Feinstein (D-Calif.) suggested in an interview Sunday that Edward Snowden could have given sensitive national security information to Russia and China.

"He went to two big cyber-intruding powers -- China and Russia -- and left China and went to Russia," Feinstein said on CNN's "State of the Union." "You've got to ask, why did he choose those two? You've got to also ask, do the Chinese have all this material? Do the Russians have it?"

Asked whether Snowden has shared the information, Feinstein said: "We don't know."

Snowden said last month that he had not had contact with the Chinese government and that he only shares information with journalists.

He was in Hong Kong -- a semi-autonomous part of China -- when his identity first became public and has been stuck in the transit zone of the Moscow airport for weeks while seeking asylum.

Feinstein has said Snowden is guilty of treason.