Germany has pointed to Russia as responsible for the incident involving an explosives-laden drone at Leipzig/Halle airport in August.
The situation in Ukraine is set to be the main topic when EU foreign ministers meet in Wicklow, Ireland, on Wednesday. Much of the discussion is likely to focus on Germany's accusations.
"It bears all the signs of state-sponsored terrorism. The only question is what to do now. We will discuss that today," says EU foreign policy chief Kaja Kallas on her way into the meeting.
Ambassador is summoned
Even more sanctions against Russian officials and companies are already underway. Several countries, including Finland, France and Sweden, are also summoning Russia's ambassadors to their foreign ministries to protest.
It will take place during the day, but I cannot specify the exact time, says Foreign Minister Maria Malmer Stenergard (M) on site in Wicklow.
"We see an attempt by Russia to divide us in Europe and deter us from our support for Ukraine. It will fail because we stand up to Russian aggression," says British Foreign Secretary Ed Miliband, who is attending the meeting as a special guest along with colleagues from Ukraine and Canada, among others.
Frozen assets?
In the EU, Sweden is now pushing hard to once again discuss how Russia's frozen state assets in Europe can be used for Ukraine.
Belgium - where most of the assets are held - said no last year, for fear of being solely liable for damages in a possible lawsuit at a later stage.
"There are of course concerns from Belgium, which I have great respect for, and that is exactly what the Commission must address. But if you go against this, you must have a different proposal on how to increase support for Ukraine," says Malmer Stenergard.
Joint responsibility
Xavier Bettel, her colleague from Luxembourg, calls for a system where all EU countries jointly take responsibility for the use of the frozen assets.
"I like it at the meetings when everyone says 'yes, we need that'. But when we have to show solidarity afterwards, most people behave like ostriches. They are very deep in the sand. If we want a functioning mechanism, there must be solidarity and responsibility together," says Bettel in Wicklow.
The European Commission estimated last autumn that there were a total of 210 billion euros in frozen Russian state assets in the EU, the majority of which - 185 billion - with the securities institution Euroclear in Belgium.
However, a proposal from the Commission to lend at least €90 billion of the money to Ukraine never materialised after Belgium vetoed it. The country was concerned about being solely responsible in a possible future compensation case and received support from Italy, among others.
Instead, EU countries agreed to raise a joint loan of 90 billion euros to support Ukraine in 2026 and 2027.
