Russian President Vladimir Putin has signed a law suspending Russia's participation in the New START treaty, the only remaining arms control treaty with the US, Russian news agency TASS reported.

According to the agency, the document was published on February 28, and the law came into force at its official publication.

"A decision to resume Russia's participation in the treaty can be made by the head of state," the agency added.

On February 21, Putin said that Moscow was suspending the New START treaty with the US over its growing involvement in the Ukraine war.

The treaty, signed in 2010 and extended in 2021 for another five years, aims to control and reduce strategic nuclear forces used by the US and Russia.