Don't try it there !
Sorry old boy-there's no GA in Eritrea. What training are you after?
They're on a kinda permanent "war-footing" with Ethiopia.
If you can observe the airfield daily, you'll see UN , Eritrean Air Force
Lufthansa & Eritrean Airlines ops.only.
Keep your "nose clean " & you'll be OK, but break their "rules " & you'll be deported as a "spy ". That has happened.
Duty -free seldom open-& there are better prices elsewhere.