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Joseph Muscat has been accused of shieling close associates from the investigation into the murder of Daphne Caruana Galizia.
We look back at some of the issues plaguing European politicians this week.
Centre-right MEPs have torn into Muscat over rule of law in Malta and his administration's alleged links to the murder of journalist Daphne Caruana Galizia.
A novel about Brexit's impact on society in the UK took home the European Book Prize.
The victim’s family want Muscat to resign immediately, saying he is shielding friends and associates from the investigation. He is refusing to leave until his party has chosen a replacement.
Angry protesters yell "shame on you" on Maltese Justice , as he arrived for a meeting with an EU parliament delegation and Prime Minister Joseph Muscat
Muscat announced on Sunday night that he would resign in January amid outcry over the two-year-old investigation into the 2017 killing of Daphne Caruana Galizia who had been looking into suspected corrupt dealings in political and business circles in the island nation.
Malta PM defends actions as opposition quits parliament
The arrest comes as the long-stalled investigation into the October 2017 car bomb murder of Caruana Galizia intensifies.
Protesters blocked roads in Malta on Friday to demand Muscat's resignation, holding placards reading "assassins" and "blood is on your hands".
The demonstration comes after three government officials resigned on Tuesday amid a probe into the killing of investigative journalist Daphne Caruana Galizia.
A prominent businessman arrested over the murder of Malta journalist Daphne Caruana Galizia was released on bail on Thursday evening.
The climate of press freedom in Malta "remains dire" two years after investigative journalist Daphne Caruana Galizia was killed in a car bomb, Reporters Without Borders has claimed in a comprehensive new report.
The sons of murdered journalist Daphne Caruana Galizia have questioned the independence of a newly announced public inquiry into their mother’s death.
Commissioner Dunja Mijatovic says that the litigation is an attempt to intimidate Galizia's family.
A damning report into Malta's failure to identify those behind the murder of a journalist has highlighted systematic failings in law enforcement and raised questions about the rule of law in the country.
A portrait has been unveiled in the European Parliament in honour of the journalist killed whilst investigating corruption in Malta.