It's offically a new country.

http://www.bbc.co.uk/news/world-africa-14089843

Their govenrment lists some maps as well.
http://www.goss-online.org/magnoliaPublic/en/states.html

Also, wikimapia seems to have the state boundaries which make up the new country.
http://www.wikimapia.org/#lat=9.7740246&lon=28.7402344&z=6&l=0&m=w