Defense Secretary Lloyd Austin was hospitalized on Sunday after suffering an “emergent bladder issue,” the Pentagon said, less than a month after he spent nearly two weeks in intensive care with complications from a surgery to treat prostate cancer.

Austin’s doctors, John Maddox and Gregory Chestnut, said in a statement that Austin was admitted to the critical care unit at Walter Reed National Military Medical Center for “supportive care and close monitoring” after his security team transported him earlier in the day with symptoms “suggesting an emergent bladder issue.” It is not clear how long he could remain hospitalized, they said, but he is expected to make a full recovery from prostate cancer.