The incident in the Gaziantep province took place in the COVID-19 intensive care unit of the SANKO University Hospital where a fire was caused by a high-flow oxygen therapy machine used in the treatment of COVID-19 patients, according to a statement by the university, Anadolu Agency reported.
Seven patients died on the scene and one died on way to another hospital.
The victims were between 65-85 years of age.
After the explosion, 14 patients receiving COVID-19 treatment in the intensive care unit were referred to various hospitals.
Police and fire service teams were dispatched to the scene. The fire was contained in a short time.
An investigation has been launched into the deadly incident.
Extending his condolences over the incident on Twitter, Turkish presidential spokesman Ibrahim Kalin wished God's mercy upon those who lost their lives and a speedy recovery to the injured people.
He said necessary measures were being taken on the scene by concerned authorities.