In a Twitter post, the media rights group noted that Rajab was sentenced to 5 years in jail only for posting a tweet.
It called for the release of the activist and 16 journalists held in jail by the Manama regime.
In June, the Bahraini Court of Appeal upheld the five-year prison term against Rajab over his tweets deemed critical of the Manama regime and the deadly Saudi-led war against Yemen.
The court ruling prompted the Bahrain Center for Human Rights calling it only an attempt to silence Rajab and stop his human rights activities and a retaliatory move against his influence in raising awareness about the human rights violations taking place in under the Al Khalifa regime.
Amnesty International condemned the court ruling in a statement at the time, saying, “It is absolutely outrageous that he has to spend another single day behind bars solely for expressing his opinion online.”
The Supreme Criminal Court sentenced the 53-year-old top opposition figure to five years in prison on February 21. Bahrain’s Court of Cassation, which has the ultimate say in the case of appeals in the country, had also upheld a two-year jail sentence against Rajab on January 15.
He faces a further 15 years in prison over a separate set of charges related to his criticism of the ruling Al Khalifa family and Wahhabism.
On December 22, 2016, Bahraini authorities accused Rajab of making comments that “harm the interests” of the Manama regime and other Persian Gulf kingdoms through an article attributed to him and published by French daily Le Monde.
The article slammed the Daesh Takfiri terrorist group for its crimes against humanity. It also condemned Persian Gulf Arab countries for their failure to stop the spread of the violent Wahhabi ideology.
Wahhabism, the radical ideology dominating Saudi Arabia and freely preached by its clerics, fuels the ideological engine of terror organizations such as Daesh and Fateh al-Sham, al-Qaeda's Syrian branch formerly known as al-Nusra Front. Takfiri terrorists use the ideology to declare people of other faiths “infidels,” justifying the killing of their victims.
International rights groups have repeatedly called for Rajab’s immediate and unconditional release. They accuse Manama of violating freedom of expression and human rights.
Thousands of anti-regime protesters have held demonstrations in Bahrain on an almost daily basis ever since a popular uprising began in the country in mid-February 2011.
They are demanding that the Al Khalifa dynasty relinquish power and allow a just system representing all Bahrainis to be established.
The Al Khalifa regime has gone to great lengths to clamp down on any sign of dissent. On March 14, 2011, troops from Saudi Arabia and the United Arab Emirates were deployed to assist Bahrain in its crackdown.
Scores of people have lost their lives and hundreds of others sustained injuries or got arrested as a result of the Al Khalifa regime’s crackdown.