At least 40 people were shot dead and more than 200 wounded in what appears to have been a coordinated attack by security forces.
Amnesty International has urged the Syrian authorities to reveal the whereabouts of at least 21 protesters who have been missing since they were arrested following demonstrations earlier this week.
Amnesty International is calling for the immediate release of eight prominent Bahraini opposition activists arrested following a violent dispersal of demonstrators in Manama.
Witnesses describe violence against Bahraini protesters to Amnesty International.
Amnesty International has condemned a Syrian crackdown as at least 30 protesters are arrested amid the continuing wave of Middle East unrest.
Bahraini protesters tell Amnesty International of bloody scenes on the streets as government security forces step up their violent crackdown on demonstrations.
Amnesty International has asked the UN Secretary-General to do more to help combat violations in Libya and support human rights in Egypt and Tunisia.
Bahrain and Saudi Arabia must immediately restrain their security forces after an anti-government protester was shot dead in Bahrain and many others injured.
Amnesty International urges the Yemeni authorities to punish security forces responsible for the killings of at least eight anti-government demonstrators over the weekend.
Authorities urged to hold security forces accountable after hundreds of protesters are injured during demonstrations in the capital.
Amnesty International warns of a campaign of attacks and harassment against journalists reporting from Libya after an Al Jazeera cameraman is shot dead.
Four men released on Thursday were among at least 10 detained while returning home from a protest against unemployment, government corruption and poor social services.
Amnesty International calls on the Bahraini authorities to ensure the safety of three human rights activists after text messages are circulated calling for them to be killed.
A group of anti-government protesters missing since they were arrested this week in Baghdad are feared to be at risk of torture, after other recently released protestors told Amnesty International they were tortured in detention.
Authorities urged to rein in security forces amid fears of a violent crackdown on mass demonstrations planned for Friday's "Day of Rage".
One protester was killed and around 100 injured in a raid by security forces on a protest camp at a university in the capital Sana'a late Tuesday night.
Amnesty International condemns the Egyptian army's heavy-handed actions to clear Cairo's Tahrir Square of protesters, after soldiers beat demonstrators and made scores of arrests.
Authorities urged to conduct an investigation into the deaths of scores of prisoners who were killed in horrific circumstances.
Government called upon to ensure the right to freedom of assembly and allow planned demonstrations to go ahead amid calls for reform in the country.
Libyan medical teams tell Amnesty International how they came under fire from pro-Gaddafi security forces while carrying out their work.