Russian President Vladimir Putin urged the West on Thursday to move quickly to meet Russia’s demand for security guarantees precluding NATO’s expansion to Ukraine and the deployment of the military alliance’s weapons there.

Speaking during a marathon annual news conference, the Russian leader welcomed talks with the U.S., which are set to start in Geneva next month, but sternly warned that Moscow expects the discussion to produce quick results.

“We have clearly and precisely let them know that any further NATO expansion eastward is unacceptable,” Putin said.

Last week, Moscow submitted draft security documents demanding that NATO deny membership to Ukraine and