Pope Francis was being treated in a hospital in Rome for bronchitis and to have medical examinations, the Vatican said Friday, the latest in a string of ailments that have raised concerns about the 88-year-old pontiff’s health.

Pope Francis is being admitted to hospital on Friday for “necessary tests” and to continue his ongoing bronchitis treatment, the Vatican said.

The 88-year-old pontiff, who has been battling health problems for years, has begun treatment in a Rome hospital.