A flight attendant on a Swiss plane that made an emergency landing in Austria has died from smoke inhalation, the airline said on Tuesday.

A Dec. 23 flight from Bucharest to Zurich diverted to Graz after experiencing engine problems and smoke filling the cockpit and cabin, Swiss International Air Lines said in a statement. statement.

The flight attendant is said to have died in intensive care at a Graz hospital on Monday. The flight attendant was one of two crew members who were hospitalized. All 74 passengers on board the Airbus A220-300 were evacuated after flight LX1885 landed safely, Schweitzer said. :

“We are devastated by the death of our beloved colleague,” Swiss CEO Jens Fellinger said in a statement. I offer them my heartfelt condolences on behalf of all of us in Switzerland.”

Swiss is a subsidiary of the German airline Lufthansa.

Swiss said in its statement that “out of respect for our loved ones, we will not provide detailed information about our employee or the cause of death.”

“Thank you in advance for helping us give the family time and privacy to grieve,” the airline added.

Twelve passengers received medical attention after the incident, Agence France-Presse reported.The airline said on Tuesday that all passengers who were admitted to hospital have since been discharged.

The Prosecutor's Office of Graz ordered to conduct a forensic medical examination on the body of the escort, the Austrian APA agency reports. He also appointed an aviation expert and started an investigation into the causes of the accident.

After the incident, Schweitzer said it was also conducting an internal investigation.

“We would like to clarify in detail the causes and effects of the smoke on passengers and crew,” the airline wrote on Thursday. “The focus is on the mechanical parts of the aircraft, such as the engine, but also the use of protective equipment for the cabin crew, known as protective breathing equipment.”

The airline said preliminary results “point to a technical problem with one of the engines”, adding that it “is not ruling anything out and is working closely with the relevant authorities – engine manufacturer Pratt & Whitney and aircraft manufacturer Airbus”.

“These are the saddest days for all of us,” said Swiss CEO Oliver Buchhofer. statement. “Losing our colleague and colleague in Switzerland leaves me stunned and disappointed. But we stand by each other at this really difficult time and we will do our best, together with the relevant authorities, to find out the reasons. We have many questions and we want to they should be answered.”