Dozens of dissident have died across prisons Egypt in August alone, says an NGO.

The Arab African Center for Freedoms and Human Rights documented deaths of 42 detainees.

According to the Cairo-based NGO, the captives mainly died due to medical negligence on the part of Egyptian authorities.

Human rights activists in the Egyptian capital have repeatedly said that many of those who die behind bars are usually in very critical condition due to torture upon arrest by Egyptian authorities.

Nearly 300 political prisoners have died in Egyptian detention facilities since 2013, according to activists.

The current military-backed government has harshly cracked down on dissent since the downfall of former President Mohamed Morsi in a military coup in July 2013.

Large numbers of supporters of the Muslim Brotherhood have been jailed since the rise of former military commander and current President Abdel-Fattah el-Sisi.