Rio Olympics organizers on Sunday threw their weight behind a police crackdown on Brazilians holding up signs in stadiums against unpopular interim president Michel Temer, despite accusations of censorship.

In multiple incidents since the Games opened Friday police have confiscated small signs featuring the words "Fora Temer," Portuguese for "Out with Temer."

Many cases involve no more than a sheet of paper held up in silence. In a creative version of the protest, a group of people at a a US-France women's football game in Belo Horizonte on Saturday sat in a row with T-shirts that spelled out "Fora Temer."

They were expelled from the stadium, Folha de Sao Paulo newspaper reported. Videos shared on social media showing several other arrests of peaceful protesters or removal of their homemade placards have stirred heated debate online.

Olympic officials said Sunday that political slogans are banned from stadiums in line with the International Olympic Committee charter which says "no kind of demonstration" is allowed.

"We are alerting the public that these kinds of manifestations are not allowed inside the venues," Rio 2016 organizing committee spokesman Mario Andrada told journalists.

"The persons that are protesting politically in venues are requested not to do that and if they do that they are asked to leave. This is a temple for sport and we need to focus on that," Andrada said.

"Obviously protests outside the venues are free provided they are not violent."

Temer, the former vice president, took over in May from Dilma Rousseff on her suspension for an impeachment trial. She faces being removed permanently from office just days after the Olympics end, if found guilty of breaking budgetary laws by the Senate.

Since becoming interim president, Temer has brought in a new government that has moved sharply to the right from Rousseff's leftist platform. If she is ejected, he will retain the presidency until 2018.

Rousseff and her supporters claim Temer engineered the impeachment procedure in a parliamentary coup.

Polls show both Rousseff and Temer are deeply unpopular. At the Olympics opening ceremony on Friday Temer kept his public remarks to a few seconds before loud booing erupted.