The journalist was shot dead in April 2019.
Detectives investigating the death of journalist Lyra Mckee have
arrested four men.
The 29-year-old was shot dead by dissident republicans in Derry 2019. At the time, she was observing rioting in the Creggan area.
The dissident group, which is known as the New IRA took responsibility for her death
in a statement.
The arrested men, who are aged 19, 20, 21 and 33 were arrested yesterday morning in Derry under the Terrorism Act. They have been transported to the serious crime suite at Musgrave Police Station in Belfast, where an interview is pending.
In a statement, DS Jason Murphy of the PSNI said: "These arrests are the culmination of a detailed two-year investigation into Lyra’s murder and the events which preceded it.
"The local community have supported the Police Service of Northern Ireland throughout the course of this protracted investigation and I wish to thank them for their continued support and patience whilst this phase of the investigation is ongoing."
Another man, Paul McIntyre, 53 from Kinnego Park in Derry has already been charged with the murder of McKee.
