BARI, Italy, June 12 (Reuters) - The heads of U.S.

corporate heavyweights Microsoft ( MSFT ) and BlackRock ( BLK )

are expected to attend talks on infrastructure development

during the Group of Seven (G7) summit in southern Italy on

Thursday, two sources familiar with the matter said.

Satya Nadella, the CEO of Microsoft ( MSFT ), and Larry Fink, his

counterpart at asset manager BlackRock ( BLK ), will be joined by

Italian business figures including the heads of energy group Eni

, utility Enel and state investment group CDP.

They will take part in talks on the G7 Partnership for

Global Infrastructure and Investment to be held at the Borgo

Egnazia venue on Thursday afternoon.

The session is expected to focus on development in Africa,

one of the key themes of the June 13-15 summit of G7 leaders

hosted by Italian Prime Minister Giorgia Meloni.

BlackRock ( BLK ) declined to comment, while Microsoft ( MSFT ) was not

immediately available for comment.