Several jurors who served in the trial of Yorgen Fenech have been arrested and questioned by police today in an investigation which is related to the trial, reports have revealed.

In a statement Thursday evening, the police did not mention any arrests but spoke of an investigation that is "linked to the oath taken by the jurors before the start of the trial".

The police investigation, the statement said, is "focused solely on these declarations, specifically public comments allegedly made by some of the jurors, and not about some theory or allegation that is being reported in the media".

The statement appealed for caution and prudence as speculation "could prejudice the investigation".

The police statement did not specify how many jurors were involved in the investigation, but it is understood that three or four were called in for questioning throughout Thursday, with the possibility that further jurors could also be questioned as the investigation continues.

The jurors were reportedly questioned by officers from the Financial Crimes Investigation Department (FCID), which deals with financial and economic crimes.

The first juror was called in for questioning before 8am on Thursday, while others were questioned later throughout the day.

The interrogations took place at the FCID offices, with the first beginning at around midday. 

The development comes just over two weeks after Fenech was acquitted of both charges he faced in connection with the assassination of journalist Daphne Caruana Galizia.

The nine-member jury returned an 8-1 not guilty verdict on both counts on 2 September, after deliberating for just over eight hours.

Fenech had been charged with complicity in the wilful homicide of Caruana Galizia and association with another person or persons for the purpose of committing a crime in Malta.

The verdict followed 55 days of proceedings, during which jurors heard extensive evidence concerning the assassination and the events surrounding it.

The prosecution is expected to appeal the verdict and seek a retrial on grounds concerning the jury trial process. Such an appeal would be decided by a three-judge court.

The Attorney General has a 15-working-day window from the verdict to file an appeal.

Separately, the Attorney General's Office confirmed on Thursday that a request by Nationalist MEP David Casa for an investigation into suspected perjury by Fenech had been forwarded to the Police Commissioner for investigation.

Casa's request concerns testimony given by Fenech under oath in which he said Electrogas and 17 Black were entirely unrelated.

Caruana Galizia was assassinated by a car bomb outside her Bidnija home on 16 October 2017.