Protesters said the ban violated freedom of expression
About 20 people gathered outside the offices of the Bahrain Telecommunications Company - the country's sole provider of internet services - demanding an end to blocks placed on several websites deemed objectionable by the authorities.
The protestors - some of them having taped their mouths shut - said the restrictions violated freedom of expression in Bahrain, whose ruler, Sheikh Hamad bin Isa al-Khalifa, has recently launched a process of democratic reform.
They also demanded the resignation of the Information Minister, Nabeel Yacoub al-Hamer.
"The information minister is responsible and we want him to resign for his inability to cope with the democratic era in Bahrain," Ali Abdelimam, who runs one of the banned websites, told the Associated Press news agency.
The information minister said the government was targeting only sites that insulted citizens, and was prepared to authorise any site that played by "the rules of dialogue".
The ban was imposed last month, and the ministry warned that it would take action against sites that "create tension between people and to provoke resentful sectarianism".
Reforms
The Gulf Arab state is due to have its first parliamentary elections in 27 years in October.
The King, Sheikh Hamad, began a series of landmark political reforms in February 2001 aimed at modernising the country.
Sheikh Hamad has also set 9 May as the date for local elections that will see women running for office for the first time.
Analysts say the reforms are aimed at healing rifts between Bahrain's Sunni Muslim ruling family and the Shia Muslim majority.