TOKYO, Sept 17 (Reuters) - The banking arm of Sumitomo Mitsui Financial Group 8316.T has agreed to buy an additional 4.2% stake in India's Yes Bank YESB.NS from an affiliate of Carlyle Group CG.O for 51 billion yen ($349 million), it said on Wednesday.
Sumitomo Mitsui Banking Corporation, Japan's second largest lender by assets, also said it had now completed its acquisition of an initial 20% stake in the Mumbai-based bank, in a deal first announced in May.
($1 = 146.2800 yen)
(Reporting by Anton Bridge
Editing by Mark Potter)
((Anton.Bridge@thomsonreuters.com;))