Gardaí and the Air Corps are investigating after the door of a helicopter fell off the aircraft as it was flying over Clondalkin in Dublin.
Nobody was injured in the incident, which happened shortly before six.
The rear door of the Air Corps helicopter fell off the aircraft as it was returning to Casement Aerodrome in Baldonnel.
The door landed in the grounds of Moyle Park in Clondalkin, but no-one on the ground or on the aircraft was injured.
According to the Air Corps, the aircraft had just completed a medical flight to a Dublin hospital.
They say the fallen door was secured by the Defence Forces personnel and An Garda Síochana within five minutes.
Both gardaí and the Air Corps say investigations are now underway into the incident.
