The EU's top counter-terrorism official has said that Hezbollah might not get onto the Union's blacklist even if it did bomb Jewish tourists in Bulgaria last year.
Gilles de Kerchove told EUobserver that Bulgaria's investigation into the incident is likely to be concluded next month.
US and Israeli officials have said the EU should list the Lebanese militant group if the Bulgarians find it guilty, in a move which would make it illegal for Hezbollah sympathisers in Europe to send it money.
But for De Kerchove, the situation is not so simple.
"First, we need to reach conclusions with strong evidence that it was the military wing of Hezbollah. That's the prerequisite, even in legal terms, but then, as always in the listing process, you need to ask yourself: 'Is this the right thing to do?'," he said.