The sit-in organized by a number of political groups and activists were held in Mecca, Buraidah, Riyadh cities as well as Joaf and Hae'l regions.
The Saudi rapid reaction forces surrounded and attacked peaceful protests in Hae'l and Buraidah regions. They also hit a female protestor in Riyadh with their cars.
They also beat people in Buraidah, Mecca, Hae'l, Riyadh and Joaf with batons.
On March 1, Saudi security forces also arrested over 300 protesters, including 15 women, after hundreds of people gathered outside the investigation and prosecution bureau in Buraidah to demand the release of political prisoners.
The Saudi regime, hit by anti-regime protests, has intensified its crackdown against dissidents.
Activists said Saudi regime forces arrested dozens of prominent figures, including two Shiite clerics Sheikh Mohammad al-Atiyah and Sheikh Badr al-Taleb, during the two-day period of March 17 and 18.
Since February 2011, demonstrators have held anti-regime protest rallies on an almost regular basis in Saudi Arabia, mainly in the Qatif region and the town of al-Awamiyah in Eastern Province, primarily calling for the release of all political prisoners, freedom of expression and assembly, and an end to widespread discrimination.
However, the demonstrations have turned into protests against the repressive Saudi regime, especially after November 2011, when Saudi security forces killed five protesters and wounded many others in the province.