Germany – a fellow Nato ally – pledged to permanently station a combat-ready brigade in Lithuania in 2023 as a response to the changing security situation in Europe.

It is expected to be operational by 2027 and to number about 5,000 soldiers and civilian employees, though it has failed to recruit enough personnel voluntarily and is now turning to compulsory assignments to fill some positions.

The majority of troops will be based in Rūdninkai, near the Suwałki Gap – a line that borders Lithuania and Poland and also links Belarus with Russia’s Kaliningrad.

Nato said that as of December last year it had more than 5,000 troops stationed in Lithuania.

The origins of last week’s drone incident over Lithuania have not been confirmed, however Defence Minister Robertas Kaunas told Newshour that it had come from the direction of Belarus.

UK Defence Secretary Wes Streeting said: “Thanks to the swift and professional actions of Lithuanian and Italian forces, Nato once again demonstrated our readiness to protect our airspace.

“We stand united, around the clock, in defence of every inch of Nato territory.”

Moscow did not comment on the incident.

Military drone incursions have become increasingly common across Europe since the beginning of Russia’s full-scale of invasion of Ukraine.

Residents in Lithuania’s capital Vilnius were also forced to take shelter in May after a drone alert was triggered, briefly grounding flights and rail travel.

Nato jets have scrambled multiple times to shoot down stray Ukrainian drones that have crossed into fellow Baltic countries Estonia and Latvia this year.

Ukraine has blamed the stray drones on Russian electronic warfare, technology designed to change the flight paths of Ukrainian drones.

Lithuania, Estonia and Latvia all joined Nato in 2004, becoming signatories to the Article 5 provision that states “an armed attack against one Nato member shall be considered an attack against all members”.