His remarks on Wednesday came during a meeting with Russia’s powerful security council where he also announced changes to the country’s nuclear doctrine.
The comments marked Russia’s strongest warning yet to the west against allowing Ukraine to launch deep strikes into Russian territory using long-range western missiles.
The Ukrainian president, Volodymyr Zelenskyy, has been asking for months for permission to use British Storm Shadow missiles and US-made Atacms missiles to hit targets deeper inside Russia.