Brazilian President Jair Bolsonaro was rushed to hospital early Monday morning for treatment of a probable intestinal obstruction, local media reported.
Bolsonaro, 66, who has been in power since 2019, was taken to Vila Nova Star hospital in Sao Paulo.
TV Globo showed images of him disembarking from the presidential plane on foot with his entourage.
Doctor Antonio Luiz Macedo, who has operated on Bolsonaro on other occasions, told news site UOL that the president would undergo several tests to examine his abdomen.
Since a knife attack that targeted him during a 2018 election campaign, in which he was stabbed in the stomach, he has undergone abdominal surgery at least four times.
About a month before he was elected president, Bolsonaro was stabbed at a campaign rally by a man who was found to be psychologically unfit for trial.