A BBC investigation has found evidence that Sudanese paramilitary fighters systematically destroyed el-Fasher's healthcare system during their long siege and subsequent takeover of the city in Darfur a year ago.

UN human rights chief Volker Türk called the findings "deeply disturbing", saying multiple attacks by the Rapid Support Forces (RSF) on civilian infrastructure, including health facilities, were serious violations of international humanitarian law and may amount to war crimes.

The RSF has rejected the BBC's findings.

The paramilitary group's health minister described the allegations as propaganda and a deliberate attempt by the national army and its allies to smear the RSF's reputation.

Using sources who were on the ground in el-Fasher, the BBC has found details of at least 43 separate attacks on hospitals and healthcare sites from May 2024 to October 2025 - some hit multiple times.

Under international law it is illegal to attack health facilities or their staff during conflict.

The…