What to know

• NATO fighter jets shot down a drone that entered Lithuanian airspace and Denmark accused a Russian frigate of firing flares at a Danish military helicopter on Tuesday, in incidents that heightened tensions along the alliance’s eastern flank.S1
• EU chief warns of wider conflict as border incursions stoke fears that Ukraine war is spilling into neighbouring states.S2
• Denmark and Russia blamed each other for the flares fired at a Danish military helicopter monitoring a Russian frigate on Monday.S3