Security tightened in Egypt on anniversary of 2011 uprising as activists mourn latest death

The coffin of Shaimaa el-Sabagh is carried out of the Zenhom morgue in Cairo, Egypt early Sunday, Jan. 25, 2015. On the anniversary of the 2011 uprising that toppled autocrat Hosni Mubarak, activists mourned the death of el-Sabagh, a 32-year-old mother of one from the Mediterranean port city of Alexandria, who was shot Saturday in downtown Cairo while taking part in a gathering commemorating the nearly 900 protesters killed in the revolt. Activists blame police for the death and the government says it is investigating. (AP Photo/Ahmed Abd El-Gwad, El Shorouk Newspaper) ** EGYPT OUT** (The Associated Press)

Egyptians march during the funeral procession of Shaimaa el-Sabagh, a 32-year-old mother of one from the Mediterranean port city of Alexandria, who was shot Saturday in downtown Cairo while taking part in a gathering commemorating the nearly 900 protesters killed in the revolution, in Alexandria, Egypt, Sunday, Jan. 25, 2015. Protests and stepped-up security came as activists mourned the death el-Sabagh. Activists blame police for her death. The government says it is investigating. Arabic on the banner with el-Sabagh's portrait reads, "martyr Shaimaa el-Sabagh," and the banner foreground left, reads, "the blood of martyrs in on our necks." (AP Photo/Heba Khamis) (The Associated Press)

Egyptians carry the coffin of Shaimaa el-Sabagh, a 32-year-old mother of one from the Mediterranean port city of Alexandria, who was shot Saturday in downtown Cairo while taking part in a gathering commemorating the nearly 900 protesters killed in the revolution, during her funeral procession in Alexandria, Egypt, Sunday, Jan. 25, 2015. Protests and stepped-up security came as activists mourned the death el-Sabagh. Activists blame police for her death. The government says it is investigating. (AP Photo/Heba Khamis) (The Associated Press)

Authorities in Egypt have tightened security in Cairo and other cities in anticipation of possible protests to mark the anniversary of the 2011 uprising that toppled autocrat Hosni Mubarak.

The stepped-up security Sunday comes a day after a female protester was shot dead in downtown Cairo while taking part in a gathering commemorating the nearly 900 protesters killed in the 2011 revolt. Activists blame the police for the death of Shaimaa el-Sabagh, a 32-year-old mother from the Mediterranean city of Alexandria. The government says it is investigating the incident.

Police have sealed off several main squares in Cairo and beefed up security at vital state installations.

Islamists opposed to the rule of President Abdel-Fattah el-Sissi say they intend to stage street protests to mark the anniversary.