Firefighting Helicopter Crash in Portugal's Douro River Leaves Four Dead, One Missing

The helicopter was returning from a mission when it crashed into the river, with the pilot surviving but hospitalized.

The helicopter was carrying five specialists from the Emergency Protection and Relief Unit.
Two bodies were found inside the aircraft, and two were near the helicopter's tail.
The cause of the crash is still under investigation.
Prime Minister Luis Montenegro declared a national day of mourning.
Extensive search operations involve first responders, maritime police, divers, and Air Force helicopters.