A senior US government official is making a rare visit to Eritrea - a country which is under sanctions over alleged ties to Islamist militants.
The acting Assistant Secretary for African Affairs, Donald Yamamoto, is to meet government officials at a time when the Eritrean authorities are seeking support to end the UN sanctions, which include an arms embargo.
The UN Security Council imposed the sanctions in 2009 after an investigation found that Eritrea was supporting armed groups in neighbouring Somalia, including al-Shabab.
Eritrea has denied the links.