A military coup on the 25th and 26th of October, followed by an agreement to reinstate Prime Minister Abdalla Hamdok on the 21st of November, has sparked further protests in Sudan.
The event took place on Sunday to mark the anniversary of the 2019 demonstrations, which led to the overthrow of Sudan's long-term authoritarian President Omar al-Bashir.
Hamdok was reinstated after being put on house arrest during November's military takeover.
Many citizens are unhappy with this move and are continuing protests in seek of an entirely civilian political leadership.
The reports of 13 counts of rape and gang rape during Sunday's demonstrations come from UN Human Rights Office spokesperson Liz Throssell, who also claimed there had been sexual harassment against women by security forces as they attempted to flee the conflict.
Speaking at a briefing on Tuesday, Throssell said, "We urge a prompt, independent and thorough investigation into the allegations of rape and sexual harassment as well as the allegations of death and injury of protesters as a result of the unnecessary or disproportionate use of force, in particular, the use of live ammunition."
Suleima Ishaq, head of the Combating Violence Against Women unit at the Ministry of Social Development, also spoke out against the sexual violence.
Speaking to AFP news agency, she said two women demonstrators had been raped at Sunday's protests, though the suspected perpetrators were not named: "One woman filed a report with the authorities while the other woman refused taking legal steps."
Regarding the death toll, the Central Committee of Sudanese Doctors announced a second fatality, with this victim having been shot in the head by security forces in Omdurman.
The first death was 28-year-old Muhammad Majzoub Muhammad Ahmad, who was announced dead on Monday.
The total death count since the anti-military protests began in October is now at 47, with hundreds injured.