NATO Secretary General Jens Stoltenberg has reacted to a Chinese proposal for a ceasefire in Ukraine.

"China doesn't have much credibility because they have not been able to condemn the illegal invasion of Ukraine," Stoltenberg said at a press conference in Tallinn, adding Beijing had signed an agreement with Russian President Vladimir Putin only days before the invasion.

Stoltenberg also underlined that NATO does not yet see China handing over lethal weapons to Russia.

"We have not seen actual delivery of lethal aid, but what we have seen are signs and indications that China may be planning and considering to supply military aid to Russia," the Secretary General added.

The day before, the Chinese Ministry of Foreign Affairs published the so-called "peace plan" with its ideas for the settlement of the war between Russia and Ukraine.

It consists of 12 points and calls for a ceasefire and the resumption of talks but does not include concrete steps.