Update(1932ET): Russian President Putin addressed the annual economic forum in St. Petersburg on Wednesday, where he took the opportunity to put the US and NATO on notice concerning Kiev being given the greenlight to use Western weapons to attack Russian territory (detailed below). 

He suggested that he's mulling the option of providing adversaries of the West with Russian long-range missiles. Below is what he said: 

"That would mark their direct involvement in the war against the Russian Federation, and we reserve the right to act the same way," Mr Putin told a three-hour meeting with the senior editors of international news agencies.

Because using such Western weapons involves military personnel of those countries controlling the missiles and selecting targets, Mr Putin claimed Moscow could take "asymmetrical" steps elsewhere in the world.

"If they consider it possible to deliver such weapons to the combat zone to launch strikes on our territory and create problems for us, why don't we have the right to supply weapons of the same type to some regions of the world where they can be used to launch strikes on sensitive facilities of the countries that do it to Russia?" he said.