There was an international played match here in Brazil at the weekend and the protests descended into violence when police stopped them reaching the stadium.
Today a military police leaflet says: "Protest in peace...Democracy, yes. Vandalism, no."
Protesters gathering in Belo Horizonte will march to the stadium where Brazil take on Uruguay in the Confederations Cup later.
More top news
Rain will push into the northwest, turning heavy and persistent in places
Thousands of dangerous appliances are still in use across the UK despite years of warnings about the dangers.
The US Navy says 10 sailors are missing and five are injured after the USS John S. McCain collided with a merchant ship near Singapore