The small Swiss-registered plane crashed near a Lidl supermarket in Tires just outside Lisbon.
The plane had reportedly been en route to Marseilles when it crashed shortly after taking off from a local airfield.
According to Portuguese media, the Swiss pilot and 3 French passengers onboard were killed as well as a truck driver who was caught up in the collision.
Associated Press reports that the Portuguese truck driver killed was offloading at the supermarket’s rear cargo bay.
The cargo bay is located about 2 kilometers from the runway of the aerodrome where the plane took off from.
The cause of the crash is still unknown and investigations are underway.
