President Barack Obama is inviting the heads of four African nations to join other world leaders at the G-8 summit to discuss food security on the continent.

The White House says the leaders of Benin, Ethiopia, Ghana and Tanzania will attend a discussion session on May 19 at Camp David, the presidential retreat in Maryland.

Obama abruptly announced earlier this year that he was moving the G-8 summit from his hometown of Chicago to Camp David. The White House said the move was aimed at facilitating a more informal and intimate discussion among leaders.

The president will still host the NATO summit in Chicago immediately following the G-8.