EU leaders are meeting in Copenhagen under pressure to boost European defence after a series of Russian incursions into EU airspace, and days after drones targeted Danish airports.
Danish Prime Minister Mette Frederiksen told reporters that from a European perspective there is only one country... willing to threaten us and that is Russia, and therefore we need a very strong answer back.
The incursions have become most acute for countries on the EU's eastern flank such as Poland and Estonia.
A number of member states have already backed plans for a multi-layered drone wall to quickly detect, then track and destroy Russian drones.
Denmark has beefed up security for the summit, banning all civilian drone flights until Friday and placing heavy restrictions on traffic in Copenhagen.
Copenhagen airport, along with several Danish airports and military sites on the Jutland peninsula, faced drone disruption last week.
Ten allies are providing anti-drone and surveillance support, according to Denmark's military, highlighting an increased presence of foreign troops and equipment.
Sweden has loaned powerful radar systems to its neighbour for the week, while Ukraine's Volodymyr Zelensky announced plans to send a mission to Denmark for joint exercises on drone defence.
German Chancellor Friedrich Merz described increasing air space incursions as getting worse and worse and it was reasonable to assume the drones are coming from Russia.
The Kremlin has denied such allegations, emphasizing the need for dialogue on security issues instead of divisions like the proposed drone wall.
European leaders are also discussing long-term defence plans, focusing on joint procurement and a need to bolster capabilities for potential future conflicts.
