NATO Secretary General Jens Stoltenberg, European Council President Donald Tusk and European Commission President Jean-Claude Juncker met in Brussels on Tuesday and signed a new joint declaration on cooperation between NATO and the EU.

NATO Secretary General Jens Stoltenberg said on Tuesday the declaration is a strong commitment to strengthen the cooperation between the European Union and NATO.

Addressing a joint press conference with EU leaders, Stoltenberg said the declaration signed "is a strong commitment to strengthen the cooperation between the European Union and NATO."

"And today’s declaration builds on the one we signed in Warsaw two years ago. Since then, NATO and the EU have achieved an unprecedented level of cooperation," NATO Secretary General said.

Also European Commission President Jean-Claude Juncker pointed to strengthening cooperation since the last NATO summit in Warsaw in 2016.

"I wanted to welcome today's Declaration which is an important landmark in our partnership. It builds on what we have already achieved together over the last two years and it strengthens our commitments to one another", European Commission President added.

"This is why as part of our new budgetary proposals we, the Commission, have proposed to increase defense spending by 22 times, bringing total defense spending to EUR 27.5 billion [$32.2 billion] from 2021 to 2027," Juncker said.

In this context, NATO and the EU agreed to aim for swift and demonstrable progress in particular in military mobility, counter-terrorism, strengthening resilience to chemical, biological, radiological and nuclear-related risks and promoting the women peace and security agenda.