The United Nations says it needs $3 billion in aid, as it warns of a spiraling humanitarian disaster in Sudan after more than one month of fighting between the Sudanese army and the paramilitary Rapid Support Forces.

Ramesh Rajasingham: “The conflict that erupted on the 15th of April last month in Sudan has killed hundreds of people, injured more than 5,000 people, and millions more have been confined to their homes, unable to access basic services and essential healthcare. And nearly a million people have been displaced, many across to neighboring countries. Today, 25 million people, more than half the population of Sudan, need humanitarian aid and protection.”

At least three pro-democracy activists were arrested by Sudanese security forces Tuesday as activists say humanitarian aid is being weaponized to gain power amid a dire need for essentials among the population. West Darfur and the capital Khartoum remain the epicenters of fighting. There have been mounting reports of rape and sexual violence, with refugees and internally displaced women and girls particularly vulnerable. There have also been nearly 200 reports of disappearances since the conflict broke out.