Current president Paul Kagame is reportedly expected to be re-elected on Monday for his third term, but the RWB reported that the authorities are using "repressive measures" to censor some members of the press.
This follows the recent order by regulatory body the Media High Council to shut down newspapers and radio stations they felt were operating "illegally".
The Council had already issued a list of "approved" radio stations and newspapers. It is understood that those excluded were effectively banned unless they successfully reapplied for registration within a given time.
According to RWB, the police also seized copies of Rwanda Newsline, an English-language newspaper published by Rwanda Independent Media Group, claiming it is not recognised in the country.
"The Media High Council's measures, coming just a few days before the election, are highly suspect," Reporters Without Borders said in a release. "The aim is to clamp down on the press and prevent journalists from doing their job as independent and impartial observers of the election process.
"How can a normal election be held without a free press, without voters having access to independent information and being able to follow an open debate? What we are seeing is not an open presidential election. It is a closely orchestrated exercise designed to return Paul Kagame to office."
Human Rights Watch also raised concerns over free speech in Rwanda in an interview with Channel 4 News, claiming that 'hate speech' laws are being used to prevent people from speaking out against the government.
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