Reuters report that a Greek prosecutor appealed on Friday against the rejection of a Maltese request to extradite Maria Efimova, the whistle-blower who was one of the sources of Daphne Caruana Galizia.

The appeal follows a court ruling on Thursday against extraditing Efimova to Malta. That court ordered Maria Efimova’s release. Following the prosecutor’s appeal, Greece’s top court is expected to hear the case, judiciary sources told Reuters.