Northern Irish police arrested four men on Tuesday under the Terrorism Act as part of an investigation into the murder of journalist Lyra McKee.
McKee's killing in April 2019 by an Irish nationalist militant during a riot in the city sparked outrage in the province where a 1998 peace deal mostly ended three decades of sectarian violence.
"The arrests have been made under the Terrorism Act after the New IRA claimed responsibility for murdering Lyra," police said.
Flowers left at the scene where 29-year-old journalist Lyra McKee was shot in Londonderry, Northern Ireland. Source: Press Association
The New IRA, one of a small number of groups that oppose the peace accord, said one of its members shot the 29-year-old reporter dead in the Creggan area of Londonderry when opening fire on police during a riot McKee was watching.
