Denmark will summon Russia's Copenhagen ambassador to a meeting over the incident, Defence Minister Jeppe Bruus separately told broadcaster TV2. Denmark summoned Russia's ambassador after a Russian frigate fired two flares at a Danish military helicopter in international waters. Key points and original sources are listed below.

• Denmark will summon Russia's Copenhagen ambassador to a meeting over the incident, Defence Minister Jeppe Bruus separately told broadcaster TV2.S1

• Denmark summoned Russia's ambassador after a Russian frigate fired two flares at a Danish military helicopter in international waters.S2

• A Russian frigate was said to have fired flares toward a Danish military helicopter in international waters, narrowly missing the aircraft.S3

• The incident occurred on Monday, the same day that NATO jets shot down a drone over Lithuania, the latest security incident on the alliance's eastern flank during Russia's war with Ukraine.S4

• "It is part of the pattern we see throughout Europe," Danish Prime Minister Mette Frederiksen warned on Tuesday morning.S5