A 44-year-old man is to appear in Belfast Magistrates court in the morning charged with having documents likely to be of use to terrorists, the PSNI said.
A PSNI spokesman said tonight the charges relate the "ongoing investigation into the activities of republican terrorists".
Last night Sinn Féin's chief Stormont administrator was charged with having confidential details of members of the police and British soldiers, including the head of the British army in Northern Ireland.
A sitting of Belfast Magistrates' Court was told a rucksack of documents were found in the home of Mr Denis Donaldson (52) from Aitnamona Crescent, Belfast, that were likely to be of use to terrorists in planning or carrying out acts of violence.
Ms Fiona Farrelly (46), a caterer from Ros Goill Park, Belfast, appeared at the same court charged with having a computer laptop containing information on Northern Ireland prison service employees.
As well as allegedly having information on a PSNI officer, and British soldiers, Mr Donaldson was charged with having details on known loyalists and with possessing a sketch of Castle Buildings, Stormont (where Northern Secretary Dr John Reid is based), and confidential documents from the Northern Ireland Office.
Both defendants were remanded in custody to a video link hearing next Friday.