The United States has been closely following reports that a Russian-led CSTO peacekeeping force has been deployed in Kazakhstan and is wondering if they have been legally invited to the country, the White House said Thursday.

According to Jen Psaki, the US is closely following reports that the Collective Security Treaty Organization has sent its collective peacekeeping forces to Kazakhstan.

She added that they have questions about the nature of this request and whether it was a legitimate invitation or not.