US Secretary of State Antony Blinken speaks in the briefing room of the State Department in Washington, DC, on January 7, 2022.
"I think one lesson in recent history is that once Russians are in your house, it's sometimes very difficult to get them to leave," Blinken told reporters.
Kazakhstan invited in the Russian-dominated Collective Security Treaty Organization to combat rare protests sparked by concern over fuel prices.
"It would seem to me that the Kazakh authorities and government certainly have the capacity to deal appropriately with protests, to do so in a way that respects the rights of protesters while maintaining law and order, so it's not clear why they feel the need for any outside assistance," Blinken said.
He called on foreign troops and Kazakh authorities to "adhere to international human rights standards," hours after President Kassym-Jomart Tokayev thanked Russia for assistance and issued shoot-to-kill orders.
Blinken, who spoke with his counterpart from Kazakhstan on Thursday, renewed his call for respect for peaceful protests, media freedom and for the end of an internet blackout.
"We're watching the situation with real concern and we're encouraging everyone to find a peaceful resolution," he said.