At least 45 people have died in fighting between the police and protesters.
Since 2003, an estimated 300,000 people have died in fighting between rebels and government-backed tribes.
In the southern coastal city of Zinjibar, five Yemeni soldiers died in fighting on Tuesday, the state-run television reported.
More than 6,100 people have died in fighting between Kiev's forces and Russia-backed rebels in east Ukraine.
Turks say the figure was far smaller, and that many Turks died in fighting as Russian-backed Armenians sought to seize part of the collapsing Ottoman Empire.
In recent weeks, Ukrainian officials claim more than 200 people have died in fighting between Ukrainian government troops and pro-Russian rebels, though this figure cannot be independently verified.
In the past week, some 15 people have died in fighting between Indonesian forces and the separatist rebels of the Free Aceh Movement (known by its Indonesian acronym, GAM).
Indonesia's president, Abdurrahman Wahid, was making his first visit as head of state to the troubled western province of Aceh, where thousands of people have died in fighting between separatist guerrillas and the security forces since the 1970s.
More than 2,000 people have died in fighting between Ukrainian forces and the separatists in recent months.
More than 2,000 people have died in fighting between Ukrainian forces and separatists in Donetsk and Luhansk.
More than 3,000 people have died in fighting between Ukrainian government forces and pro-Russian rebels in the eastern Donetsk and Luhansk regions since April.
