Probe into use of drone near site of crash that killed four in Clonmel

Flowers and tributes left at the scene in Clonmel (Brian Lawless/PA)

The Irish Aviation Authority has launched an investigation into the use of a drone near the site of a crash in Co Tipperary as first responders attended the scene.

The semi-state air space regulator said it could have hindered the emergency response that was under way at the time.