Russia has issued a nuclear warning to NATO as tensions rise in the Baltic region, according to news roundups published on Wednesday.

The warning comes amid a period of elevated friction between Moscow and the Western alliance. Baltic states have reported increased Russian military activity in the area in recent months, and NATO has stepped up patrols and exercises in response.

No further details of the warning — its exact wording or the channel through which it was delivered — were available in the reports published so far. Russian officials have in the past used nuclear rhetoric to signal red lines over Western support for Ukraine and NATO deployments near its borders.

The development lands on a busy diplomatic day: EU leaders are meeting in Copenhagen to discuss strengthening Europe’s common defence and continued support for Ukraine, and Nordic energy ministers are gathering in Helsinki.

Analysts quoted in recent coverage note that such warnings are often aimed as much at Western publics and policymakers as at military planners. The situation remains fluid, and officials in NATO capitals had not issued a coordinated response at the time of reporting.