Tennessee authorities are investigating a fatal shooting in Memphis by two National Guard troops that has raised new questions about the Trump administration's deployment of troops to U.S. cities.

A man has been arrested after a 39‑year‑old man was shot dead in Dún Laoghaire, Co Dublin, at the weekend.

An off-duty Riverview officer working a secondary security at the gas station came to assist, and police said Green leaned out of the car and shot at the officer.