An Ethiopian military base close to the Sudanese border is lending support to the Rapid Support Forces, according to a report by a research unit at Yale University released Wednesday.
The Yale School of Public Health's Humanitarian Research Lab (HRL) said analysis of satellite imagery and open-source data shows activity "consistent with military assistance to the RSF" at an Ethiopian base in Asosa, in the Benishangul-Gumuz region, between late December 2025 and late March 2026.
The paramilitary group, which has been at war with Sudan's army since April 2023, was accused last month by the Sudanese military of launching drone attacks "from inside Ethiopian territory", the first public allegation of Ethiopian involvement in the conflict.
Ethiopia has denied the claim and has also rejected allegations that it is hosting RSF camps.
Yale's HRL has used remote sensing data and satellite imagery to monitor the war since it began.
Its researchers said their findings "represent clear visual evidence over a five-month period" that RSF attacks on Sudan's southeastern Blue Nile State were being launched from within Ethiopia.
The researchers identified repeated arrivals of commercial car carriers at the base unloading vehicles known as "technicals", light pickup trucks commonly used by armed groups.
HRL said these vehicles do not match those normally used by the Ethiopian military and have been observed supplying RSF units operating in Sudan's Blue Nile state.
According to the report, some of the vehicles were later fitted with gun mounts "capable of holding heavy machine guns".
Objects consistent with 50-calibre weapons were also observed nearby, the report said.
HRL added that similar vehicles later appeared in open-source images from fighting around Al-Kurmuk, a strategic Sudanese border town roughly 100 kilometers (62 miles) by road from Asosa.
Recent fighting has intensified around Al-Kurmuk, a key army position.
This year, an estimated 28,000 people were displaced by fighting in Blue Nile, including more than 10,000 from Al-Kurmuk alone.
Control of the state is divided between Sudan's army and RSF allies from the Sudan People's Liberation Movement-North (SPLM-N), led by Abdelaziz al-Hilu.
The paramilitaries have recently claimed victories in the area.
The Yale lab also documented increased logistical activity at the Asosa base, including the arrival of shipping containers, fuel tanks and tents capable of housing up to 150 people.
White armored vehicles inconsistent with Ethiopian military markings were also seen, alongside frequent movements of non-military transport trucks.
Separately, satellite imagery showed significant expansion at Asosa airport, including "a new hangar and concrete pad" and defensive fighting positions.
Imagery previously analyzed by AFP has shown significant development at the airport, which previously served as a drone base.
The RSF last year brought thousands of fighters into Ethiopia, an RSF source and an army source told AFP.
Separately, two UN agencies said on Thursday that more than a million Sudanese refugees face drastic cuts in life-saving aid such as food and water unless donors fill a funding shortfall of over $400 million.
Over 1.3 million Sudanese refugees are living in neighboring Chad, with most of them arriving since the start of the conflict in Sudan between the army and the RSF in April 2023. Among them are survivors of mass killings and famine from Darfur.
The World Food Programme and the UN refugee agency do not have enough funds to help them all and envisage further cuts in the coming months unless a $428 million shortfall can be met, they said in a joint statement.
"...With less than half the resources we require, we cannot deliver sufficient food to the people who need it most,” said WFP Chad Country Director Sarah Gordon-Gibson. "This will force them into devastating coping strategies and put lives at risk.”
