A woman lights a candle in memory of Italian PhD student Guilio Regeni, who was killed in the capital in January, at Saint Joseph's Roman Catholic Church in Cairo, Egypt March 5, 2016 (Reuters)

A statue stands outside the Saint Joseph Roman Catholic Church in Cairo, Egypt March 5, 2016 (Reuters)

Clergymen pray before the altar in memory of Italian PhD student Guilio Regeni, who was killed in the capital in January, at Saint Joseph's Roman Catholic Church in Cairo, Egypt March 5, 2016 (Reuters)

Egypt's Tourism Minister Hisham Zaazou speaks during a mass in memory of Italian PhD student Guilio Regeni, who was killed in the capital in January, at Saint Joseph's Roman Catholic Church in Cairo, Egypt March 5, 2016 (Reuters)

Egypt's Tourism Minister Hisham Zaazou attends a mass in memory of Italian PhD student Guilio Regeni, who was killed in the capital in January, at Saint Joseph's Roman Catholic Church in Cairo, Egypt March 5, 2016 (Reuters)

Clergymen pray before the altar in memory of Italian PhD student Guilio Regeni, who was killed in the capital in January, at Saint Joseph's Roman Catholic Church in Cairo, Egypt March 5, 2016 (Reuters)

The church choir sings during the mass in memory of Italian PhD student Guilio Regeni, who killed in the capital in January, at Saint Joseph's Roman Catholic Church in Cairo, Egypt March 5, 2016 (Reuters)

Clergymen kneel before the altar in memory of Italian PhD student Guilio Regeni, who was killed in the capital in January, at Saint Joseph's Roman Catholic Church in Cairo, Egypt March 5, 2016 (Reuters)

Egypt's Tourism Minister Hisham Zaazou lights a candle in memory of Italian PhD student Guilio Regeni, who was killed in the capital in January, at Saint Joseph's Roman Catholic Church in Cairo, Egypt March 5, 2016 (Reuters)