Army officers who seized power in a coup in Gabon on Wednesday have named General Brice Oligui Nguema as the West African state's transitional leader.

General Nguema was earlier carried triumphally through the streets of the capital Libreville by his troops.

The deposed President, Ali Bongo, has appeared in a video at his home, calling on his "friends all over the world" to "make noise" on his behalf.

Bongo's overthrow ended his family's 55-year hold on power.