Rights groups and witnesses say the number of those killed in the violence could run into the thousands. Chinese authorities have never released a full death toll and have banned any public commemoration.
It is the 9th protest of its kind since February.
Albanian opposition protesters on Thursday made further attempts to enter the country's parliament by force as they demand the government's resignation and an early election.
The Balkans have been bombarded with political protests of late as thousands marched in Serbia's capital of Belgrade and Montenegro's capital of Podgorica on Saturday.
Euronews looks at why people are continuing to protest in Sudan
Protesters gathered in front of Albania's parliament on Thursday as pressure increased on the government to step down
Protesters in Serbia stage 10th week of demonstrations against Vucic
NBC's Gadi Schwartz talked to marchers in Washington D.C., and to American University Professor Jane Hall about the characteristics of effective protests.
Rival rallies have been held in Nicaragua after a recent wave of violence that has left hundreds dead
Poland sees a new wave of protests as President Duda signs contested judicial appointments law that accelerates changes in Supreme Court.
Three months into a wave of protests which has engulfed Nicaragua, some in the Central American country are saying that it's on the brink of a new revolution
Jordanians vow to continue nightly protests demanding the scrapping of planned tax reform despite pledges to revise bill.
Rejects name talks with Athens, slams government's policies, and calls for early election.
What the election of protest leader Nikol Pashinyan as Armenia’s prime minister means for a young Armenian.