The current Turkish block on Twitter is the latest in a series of actions against social networks, which often happen when a government's grip on power is under threat. Here are some other examples.

EGYPT (January 2011): Setting a historic precedent, Egyptian authorities blocked Internet access on January 28, 2011, to undermine opponents to the regime of president Hosni Mubarak who had used Facebook and Twitter to organize rallies.

A satirist renowned for attacking what he calls unprofessionalism in Egypt's media has been pilloried on Twitter for plagiarism after he admitted not crediting analysis in his weekly column.

Bassem Youssef tweeted an apology hours after his column appeared in Tuesday's independent daily Al-Shourouk.

At least one person was killed Wednesday in clashes between Egyptian police and student supporters of deposed President Mohammed Morsi, as protests resumed on campuses across the country.

A 15-year-old boy was shot dead outside Beni Suef University south of Cairo, a hospital official said.

Two senior Egyptian army officers were killed during a raid on a jihadist hideout north of Cairo on Wednesday, as security forces close in on militants in the Nile Delta.

Six members of the Al-Qaida-inspired Ansar Beit al-Maqdis (Partisans of Jerusalem) group, which has been implicated in spate of attacks on security forces, were also killed in the hours-long shootout, the army and police said.

Interim president Adly Mansour said Egypt will have an "elected" leader in two and a half months, in an interview published Friday by the state-owned Al-Ahram daily.

The presidential election is seen as a major milestone in a transitional roadmap outlined by the military-installed authorities for a return to democratic rule after the army ousted Islamist president Mohamed Morsi in July.

A case of sexual harassment in one of Egypt's largest universities has sparked outrage after the dean said the women's outfit triggered the incident.

In a video that has gone viral on social networks and has been covered by local media, Cairo University security guards escort a student wearing tight black pants and a long sleeved pink top after she hid in a toilet from dozens of male students who were sexually harassing her.

Egyptian police prevented supporters of ousted Islamist President Mohammed Morsi from holding a press conference on Tuesday, asking journalists to leave the venue.

The press conference was called by the Islamist Anti-Coup Alliance in response to an official report on a deadly police crackdown on pro-Morsi protest camps in August.

Gaza's Hamas rulers on Tuesday sharply criticized Egypt's closure of the Rafah border crossing, saying Cairo's tightening of restrictions against the Palestinian territory was a "crime against humanity."

"The Egyptian authorities' insistence on closing the Rafah crossing and tightening the Gaza blockade... is a crime against humanity by all standards and a crime against the Palestinian people," Hamas spokesman Fawzi Barhum said in a statement.

An Egyptian court sentenced a policeman to 10 years Tuesday for the deaths of 37 prisoners who suffocated on tear gas in one of the most brutal incidents in a crackdown on Islamists.

The court verdict, which also saw three other police officers handed one year suspended jail terms, was the first against policemen for violations during the crackdown on supporters of President Mohammed Morsi since his ouster by the army in July.

Egypt's official human rights body on Monday blamed security forces and "armed elements" among protesters for the death of hundreds during the dispersal of a massive Islamist sit-in last August.

The National Council for Human Rights said 632 people, including 8 policemen, were killed on August 14 when security forces dispersed Cairo's Rabaa al-Adaweya sit-in, organized by supporters of deposed Islamist President Mohammed Morsi.