Ten people have been arrested in the October car bombing of Maltese investigative journalist Daphne Caruana Galizia, whose killing shocked the island nation and Europe. Malta Prime Minister Joseph Muscat said at a press conference that there was “reasonable suspicion” all were involved in the bombing and that all 10 were Maltese nationals. Just days ago, members of the European Parliament who went on a fact-finding trip to Malta to probe the circumstances of Galizia’s death left the island “even more worried” than when they had arrived. The delegation found it “extremely disturbing” that some officials did not answer basic questions—and one top authority never even bothered to show up. Muscat, whose administration has been reported to be rife with corruption, announced that he was making it his “personal commitment” to find who commissioned and executed the attack on the 53-year-old reporter. The Daily Beast’s Barbie Latza Nadeau reports that FBI investigators have been limited to examining the blast’s Semtex explosives, but no other details of the probe.