BRUSSELS, Feb 23 (Reuters) - NATO Secretary-General Jens Stoltenberg said on Thursday the alliance had seen signs China was considering supplying arms to Russia and warned Beijing against taking any such step. The announcement came days after U.S. Secretary of State Antony Blinken warned China of consequences if it provided material support to Russia's invasion of Ukraine. "We haven't seen any supplies of lethal aid from China to Russia, but we have seen signs that they are considering and may be planning for that," Stoltenberg told Reuters in an interview. There was no immediate comment from China, but its Foreign Ministry said earlier on Thursday any potential intelligence on arms transfer by China to Russia that the United States plans to release was just speculation. Stoltenberg said China was a member of the U.N. Security Council and that Russia's war against Ukraine violated the U.N. Charter.

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