Brazilian President Jair Bolsonaro has been taken to hospital in Brasilia, the local media O Globo reported on Monday.
The minister of the Institutional Security Office (GSI), Augusto Heleno, has been to the hospital to monitor the president's condition, but has assured "it's no big deal".
The medical team confirmed that Bolsonaro had undergone a computer tomography scan of the skull, which did not detect any changes in the brain.
The president is supposed to be under observation at least until Tuesday morning.
It is not the first time the Bolsonaro's life has been under threat, as earlier in November, a man was arrested for plotting an attack on the Brazilian leader.