"We have recorded 100 cases of rape against women committed on September 28 and the two days that followed," Thierno Maadjou Sow, president of the Guinean Organisation of Human Rights, said.

"Most of them were schoolchildren, students, businesswomen, teachers, even journalists," according to Reuters.

The organisation also revealed evidence that 20 victims were taken from a medical clinic to secret locations where they were drugged and raped repeatedly.

Witnesses have said some soldiers violated women using gun barrels and bayonets.

The demonstrators were gathered in a Conakry stadium to protest against an eventual presidential candidacy of the country’s military leader Captain Musa Dadis Camara, who earlier promised not to run for future elections but was later showing interest.

The crackdown has drawn widespread condemnation and brought sanctions against the ruling military junta who came to power after the death of former President Lansana Conté in December 2008.