Greek banks are likely to need additional capital after results of a health check are finalised this month, the country's central bank said potentially threatening government plans.

The troika will not be back to Athens before the 27 January Eurogroup meeting, with finance ministry officials stating their wish to travel to travel along in order to conclude an agreement, which has been in the pipeline for over six months.

Dimitris Christopoulos, a university professor and prominent member of the Hellenic League of Human Rights, said at the French News Agency (AFP) the challenge prosecutors face is establishing "a link between suspected acts and actual charges".