President Barack Obama is in Ethiopia on the second leg of his African tour to hold talks with government officials and discuss the civil war in South Sudan with regional leaders.
President Obama will also be the first US president to address the 54-member African Union at its headquarters in Addis Ababa on Tuesday.
Mr Obama flew to Ethiopia after a two-day visit to Kenya.
There he had discussed trade and security but also called for greater human rights and warned of the dangers of corruption.
The US president was greeted at Addis Ababa’s international airport by Ethiopian Prime Minister Hailemariam Desalegn.
On Monday, Mr Obama is due to discuss ways to bring South Sudan’s 19-month-old civil war to an end.