EU foreign policy chief Kaja Kallas has warned that Russia is intensifying hybrid operations across Europe, citing sabotage attempts, airspace violations and Russian drones and missiles crossing into Moldovan territory.

Her intervention adds pressure for a more coordinated European response to hostile activity below the threshold of conventional warfare.

Russia is putting lives at risk across Europe through an expanding campaign of hybrid activity, EU foreign policy chief Kaja Kallas said on Monday, after another series of Russian drones and missiles entered Moldovan airspace.

Speaking in Brussels alongside Moldovan Prime Minister Vasile Tofan and Enlargement Commissioner Marta Kos, Kallas said Europe had experienced an increase in sabotage attempts and airspace violations during recent weeks.

“Russian missiles and drones violated Moldovan airspace again over the weekend,” she said, describing the incidents as unacceptable.

According to the official EU record of the press conference, Kallas said the Kremlin was seeking to create fear and interfere with European decision-making, and argued that the response should include greater resilience and continued support for Ukraine.

Her remarks follow Russia’s renewed large-scale attacks against Ukraine’s energy system and continued reports of drones crossing borders beyond Ukrainian territory.

Moldova’s defence authorities reported that three drones entered Moldovan airspace during Russia’s 30 September attack on Ukraine. Moldova, which shares a long border with Ukraine and is seeking EU membership, has repeatedly accused Moscow of attempting to destabilise the country.

The latest incidents broaden a European debate that has been developing for months: how governments should respond to hostile operations that are deliberate and potentially dangerous but fall short of an overt military attack.

EU Today reported on 28 September that European governments were discussing an emergency security protocol intended to improve coordination when member states face sabotage and other hybrid threats.

That followed earlier warnings concerning suspected attacks on infrastructure, cyber operations, interference campaigns and airspace violations across several European countries.

The problem is partly one of attribution and partly one of thresholds.

A conventional armed attack on a NATO member may trigger consultation under Article 4 or, in sufficiently serious circumstances, collective defence provisions under Article 5. The European Union also has its own mutual assistance provision under Article 42.7 of the Treaty on European Union.

Hybrid activity is frequently designed to remain below those thresholds.

Cyberattacks, covert sabotage, GPS interference, disinformation, drones and operations conducted through intermediaries can impose costs without giving governments an obvious basis for a military response.

Kallas’s warning comes as Germany has also reported an increase in activity it attributes to Russia.

Chancellor Friedrich Merz has warned that Germany faces growing hybrid pressure involving drones and cyber operations. European security services have separately investigated suspected Russian involvement in sabotage and attacks on infrastructure in several countries.

Moscow has denied Western accusations that it is directing such operations.

The EU has already used sanctions against individuals and entities accused of Russian hybrid activity, while governments are considering faster systems for sharing intelligence and attributing incidents.

EU Today examined the debate in September as the European Parliament considered proposals for quicker attribution, stronger intelligence-sharing and improved protection of critical infrastructure.

Moldova occupies a particularly exposed position.

The EU has provided €317 million through the European Peace Facility for Moldovan defence modernisation, according to Kallas, including €120 million allocated in 2026 for air defence. Brussels is also supporting Moldova through its EU Partnership Mission, which provides assistance against hybrid and cyber threats.

Unlike Ukraine, Moldova is not a NATO member and has constitutional neutrality. Its ability to counter Russian missiles or drones entering its airspace is therefore closely connected to the development of its own detection and air-defence capabilities.

For the EU, repeated incidents involving Moldova, NATO airspace and European infrastructure are increasingly being considered as parts of the same security problem rather than isolated events.

Moldova’s Prime Minister Vasile Tofan will meet senior EU officials in Brussels on Monday as the country attempts to move from the opening stages of accession negotiations towards deeper economic, security and institutional integration with the European Union.

The 10th EU-Moldova Association Council will be held in Brussels on 5 October, chaired by EU foreign policy chief Kaja Kallas. Tofan will lead the Moldovan delegation, while Enlargement Commissioner Marta Kos will represent the European Commission.

The meeting will review Moldova’s accession process, political reforms, justice, freedom and security, foreign and security policy, trade, energy and wider economic co-operation. Regional and global security issues will also be discussed during a restricted session.

The timing is significant because Moldova has moved considerably further along the accession process during 2026.

In June, the EU formally opened negotiations on the Fundamentals cluster, which covers the rule of law, fundamental rights, democratic institutions, public administration and economic criteria. Progress in that cluster determines the overall pace of accession negotiations.

EU Today described that step as the point at which the accession bids of Moldova and Ukraine moved from political commitment to a practical rule-of-law test.

A second step followed in July when negotiations began on the External Relations cluster. That part of the process covers commercial policy, development co-operation and alignment with the EU’s common foreign, security and defence policy, including sanctions.

Moldova is consequently moving beyond the declaration that it has a European future and into negotiations over specific areas of EU law.

That process is taking place under conditions markedly different from previous rounds of enlargement.

Moldova borders Ukraine and has faced persistent Russian political pressure, disinformation campaigns and attempts at electoral interference. Energy vulnerability remains another concern, while the unresolved Transdniestria conflict leaves part of the country outside the effective control of the government in Chișinău and with Russian forces still present.

Security and accession policy have therefore become increasingly difficult to separate.

At the EU-Moldova summit in June, European leaders concentrated on accession, reform implementation and gradual integration into EU structures. The meeting took place only a week after the first negotiating cluster was opened.

EU Today argued at the time that the summit had turned Moldova into a test of whether enlargement can provide practical security and resilience for a candidate country exposed to sustained Russian pressure.

Finance is another component of that policy.

Moldova is benefiting from the EU’s €1.9 billion Reform and Growth Facility, intended to accelerate economic convergence and reforms connected to accession. The Commission’s current Moldova enlargement record shows that a second regular payment of €189 million was delivered in March 2026.

The Association Council will not decide when Moldova joins the European Union. Accession remains conditional on reforms, compliance with membership criteria, completion of negotiations and unanimous approval by the member states.

What Monday’s meeting will show is whether the process is maintaining momentum.

Moldova and Ukraine formally began accession negotiations together in 2024 and entered the first substantive negotiating cluster together this June. The two countries remain politically connected in the EU enlargement debate, although Brussels formally assesses each candidate on its own record.

The next challenge is less ceremonial.

Opening clusters demonstrates political progress. Closing negotiating chapters requires legislation to be adopted, institutions to function and reforms to be enforced beyond their appearance in government programmes.

For Moldova, that work is being undertaken while the country manages Russian pressure, energy security, economic restructuring and domestic political change.

Monday’s Association Council will provide Brussels with its latest opportunity to judge whether those pressures are slowing the accession process or whether Moldova remains capable of moving through the EU’s negotiating machinery.