SAO PAULO— Former Brazilian President Jair Bolsonaro was transferred Saturday by medical aircraft from northeastern Brazil to the capital Brasilia after being hospitalized with abdominal pain a day earlier.

Bolsonaro was hospitalized Friday morning while traveling in northeastern Brazil. The pain was caused by a bowel obstruction and was related to long-term effects of being stabbed in the abdomen in September 2018, his doctors said.

Bolsonaro has been in and out of hospitals since the…