From the U.S. State Department:
The U.S. Department of State continues to warn U.S. citizens of the risks of travel to Eritrea and strongly recommends U.S. citizens defer all travel to the country. ...
Current information on safety and security can also be obtained by calling 1-888-407-4747 toll-free in the United States and Canada, or a regular toll line at 1-202-501-4444 for callers from other countries. These numbers are available from 8:00 a.m. to 8:00 p.m. Eastern Time, Monday through Friday (except U.S. federal holidays). You can also stay up-to-date by bookmarking our Bureau of Consular Affairs website, which contains the current Worldwide Caution.
U.S. State Department Warning