FILE - In this Saturday, June 3, 2017 file photo, South Sudanese refugee women who suffered sexual or other gender-based violence play a board game at a women's center focusing on such violence, run by the aid group International Rescue Committee, in Bidi Bidi, Uganda. A new study released Wednesday, Nov. 29, 2017 says the "shocking scale" of violence against women and girls in South Sudan is double the global average. (AP Photo/Ben Curtis, File)

JUBA, South Sudan - The "shocking scale" of violence against women and girls in South Sudan is double the global average, a new study released Wednesday says.

The first comprehensive report on the "magnitude, frequency and brutality" of such violence in South Sudan's conflict zones was released by the International Rescue Committee and George Washington University's Global Women's Institute.

As the world's youngest nation approaches its fifth year of civil war, rape has often been used as a weapon by both government and opposition forces.

The civil war has killed more than 50,000 people, forced more than 2 million to flee abroad and plunged parts of the country into famine.

Up to 65 per cent of women and girls interviewed for the new study said they had experienced sexual or physical violence. Over half of the women reported domestic abuse. Women and girls living in the United Nations-run civilian protection site in the capital, Juba, were most vulnerable to sexual violence.

Chuol Madol said she was gang-raped by government soldiers in October when she left the camp in Juba to look for firewood.

"Women were crying but we were so deep in the bush that no one could help us," the 27-year-old told The Associated Press. "We're not fighting anyone. We're only here, trying to live."

The new report cites a "breakdown in the rule of law" in South Sudan, meaning perpetrators go unpunished.

"As we have seen in South Sudan time and again since this war started, armed forces on all sides engage in sexual violence with impunity. It is used both opportunistically and as a weapon of war to intimidate, punish and abuse civilians," said Jehanne Henry, senior Africa researcher for Human Rights Watch.

Civil society organizations are calling on South Sudan's government and U.N. agencies to create a "concrete strategy" for combatting the violence.

The government did not respond to a request for comment on the new study. Earlier this year, acting spokesman Choul Laam condemned reports of rampant sexual assault, telling the AP the government was "moving swiftly to protect civilians from such behaviour by educating all armed forces and holding the perpetrators accountable."

"Perpetrators of violence against women and girls in South Sudanese communities are multiplying regularly," said Edmund Yakani, executive director for the Community Empowerment for Progress Organization, a local advocacy group.

In light of the new UK-funded study, the British government has increased support aimed at helping 750,000 survivors in South Sudan and around the world to help "stop the cycles of violence."

News from © The Associated Press, 2017