Multiple nations bordering Russia, including the Baltics, Finland, Norway, and Poland, are creating what they called a “drone wall” air defense system to help defend their collective borders.

Agne Bilotaite, Lithuania’s Interior Minister, told the Baltic News Service, the multinational partnership would create “a drone border from Norway to Poland,” which would “protect our border with the help of drones and other technologies.”

Added Bilotaite: “Not only physical infrastructure, surveillance systems, but also using drones and other technologies that would allow us to also protect ourselves from provocations by unfriendly countries, and prevent contraband.”

She said the plan is still in its formative stages, with no exact timeline for completion.

Earlier this month, Polish Prime Minister Donald Tusk revealed Poland had signed on to join the European Sky Shield Initiative. The project involves 21 NATO countries, and will establish an Iron Dome-like all-weather system to take out incoming missiles and drones.

The announcement comes as Poland’s Foreign Minister Radoslaw Sikorski claimed the United States would carry out strikes on Russian troops on Ukrainian soil in the event the Kremlin opts to use nuclear weapons.

“The Americans have told the Russians that if you explode a nuke, even if it doesn’t kill anybody, we will hit all your [positions] in Ukraine with conventional weapons, we’ll destroy all of them,” Sikorski told The Guardian.

He said China and India have also warned Russia against the use of nukes.

“And it’s no child’s play,” he said, “because if that taboo [of using nuclear weapons] were also to be breached, like the taboo of not changing borders by force, China knows that Japan and [South] Korea would go nuclear, and presumably they don’t want that.”