South African retired archbishop Desmond Tutu was readmitted to a Cape Town hospital, one week after he was discharged, his foundation said in a statement Tuesday. Tutu, a Nobel Peace Prize laureate, had recently completed an intensive antibiotics treatment for an infection.

The 83-year-old Anglican archbishop emeritus returned to the hospital Tuesday afternoon “after expressing renewed discomfort,” said the foundation, which is named after Tutu and his wife, Leah. Tutu’s daughter, Reverend Canon Mpho Tutu, said her father’s hospitalization was unrelated to his prostate cancer treatment.

"His doctors considered it prudent for him to return to hospital for observation,” the Desmond and Leah Tutu Legacy Foundation quoted Mpho as saying in a statement posted on Facebook. "He'll have a few days of bed rest while his medical dream team brings the situation under control and determines the next course of action, if any. He will stay in hospital until the weekend, at least.”

Tutu was admitted to the hospital last Tuesday with an undisclosed but “persistent infection,” his foundation said. Over the past few years, he has been hospitalized several times for various reasons. The anti-apartheid activist survived polio as a baby and tuberculosis as a teen, and has lived with prostate cancer for the past 15 years, according to the Guardian.