MOSCOW -- The potential deployment of NATO forces to Ukraine is unacceptable, Kremlin Spokesman Dmitry Peskov said Thursday.

Such a move would pose a "critical danger" to all European and global security, Peskov said.

Peskov's comments came after Ukrainian officials on Wednesday held talks with delegations from the United States, Britain, France and Germany in London.

In early March, British Prime Minister Keir Starmer announced a plan to form a "coalition of the willing" to bolster support for Ukraine.

At a summit in Paris later in March, French President Emmanuel Macron raised the idea of deploying "reassurance forces" from a few willing European Union member states to strategic locations in Ukraine should a peace agreement be reached with Russia.