The US official who wrote a Pulitzer Prize-winning book on genocide landed Saturday in Khartoum, aiming to support Sudan’s fragile transition to democracy before traveling to Ethiopia to press the government there to allow humanitarian aid to the war-torn Tigray region.

Samantha Power, administrator of the US Agency for International Development, is set to meet with top Sudanese officials including Gen. Abdel-Fattah Burhan, head of the ruling sovereign council, and Prime Minister Abdalla Hamdok, the civilian face of Sudan’s transitional government.

She will also travel to Sudan’s western region of Darfur where she said she investigated atrocities in the its civil war in the 2000s.

“I first visited Sudan in 2004— investigating a genocide in Darfur perpetrated by a regime whose grip on power seemed unshakeable. I couldn’t imagine Sudan would one day be an inspiring example to the world that no leader is ever permanently immune from the will of their people,” Power wrote on Twitter upon her arrival in Khartoum.

Power’s visit to Khartoum is meant to “strengthen the US Government’s partnership with Sudan’s transitional leaders and citizens, explore how to expand USAID’s support for Sudan’s transition to a civilian-led democracy,” USAID said.

Sudan is now on a fragile path to democracy and is ruled by a military-civilian government after a popular uprising led to the military’s ouster of longtime autocrat Omar Al-Bashir in 2019. The Khartoum government, which seeks better ties with the US and the West after nearly three decades of international isolation, faces towering economic and security challenges that threaten to derail its transition into chaos.

The US official would also meet with Ethiopian refugees in Sudan who recently fled the conflict and atrocities in the Tigray region which borders Sudan.

Since the Tigray war began in November, tens of thousands of Ethiopians have crossed into Sudan, adding to the country’s economic and security challenges.

Power’s five-day trip will also take her to Ethiopia as part of international efforts to prevent a looming famine in Tigray, a region of some 6 million people that has been devastated by the months-long war.

Power will meet with Ethiopian officials “to press for unimpeded humanitarian access to prevent famine in Tigray and meet urgent needs in other conflict-affected regions of the country,” USAID said.

The world’s worst hunger crisis in a decade is unfolding in Tigray, where the US says up to 900,000 people now face famine conditions and international food security experts say the crucial planting season “has largely been missed” because of the war.

Ethiopia’s government has blamed the aid blockade on the resurgent Tigray forces who have retaken much of the region and crossed into the neighboring Amhara and Afar regions, but a senior official with the US Agency for International Development this week told the AP that is “100 percent not the case.”

-AP