Northern Ireland Leaders Urge Calm as Police Arrest Two Over Journalist’s Killing

Flowers are seen at the scene where the 29-year-old journalist Lyra McKee was shot dead, in Londonderry, Northern Ireland on April 19, 2019. Clodagh Kilcoyne/Reuters

LONDONDERRY—Two men have been arrested in Northern Ireland over the killing of a journalist during a riot, police said, with politicians calling for calm after the shooting added to concerns about the stability of the region’s 21-year-old peace deal.

Lyra McKee, 29, an award-winning journalist who was writing a book on the disappearance of young people during decades of violence in Northern Ireland, was shot dead on Thursday as she watched Irish nationalist youths attack police following a raid.