Three men have been charged with the murder of Malian research journalist and blogger Daphne Caruana Galizia.
The men have declared themselves innocent, inform the local media. They were also accused of possession of material and weapons for the manufacture of bombs.
Caruana Galizia died in an explosion shortly after he left his home in Bidnija, near Mosta, on October 16.
The 53-year-old man was known for his blog accusing the leading politicians of corruption.
On Monday, police arrested 10 Maltese citizens in connection with the murder. The police operations were carried out in the city of Marsa, and the areas of Bugibba and Zebbug.
- Malta Anti-Corruption Warrior
- Country Profile in Malta
Prime Minister Joseph Muscat said that some of the 10 detainees were already known to the police while others had a criminal record.
The Times of Malta reports that the three men who have been accused were among those arrested.
The government offered a reward of 1 million euros (£ 890,000, $ 1.2 million) for information on the murder of Caruana Galizia.
Collaboration was requested from international experts, including the FBI, to assist in the investigation.
On his blog Running Commentary, Caruana Galizia had relentlessly reported on the alleged corruption among politicians of all parties.
With a career that spans more than three decades, he was "one of Malta's most important, visible, intrepid journalists," in the words of former Minister of Internal Affairs Louis Galea.
Hundreds of people attended his funeral, but the small leaders of the EU state were excluded by his family.
The editors of eight of the world's largest news organizations, including the BBC, called for the European Commission, the EU executive, to investigate the murder.
In response, Frans Timmermans, vice president of the commission, urged the authorities to leave "no stone" in the case.