Reliance Group Chairman Anil Ambani has been summoned by the ED in connection with its money laundering probe against Yes Bank promoter Rana Kapoor and others, officials said on Monday.They said Ambani was asked to depose at the Enforcement Directorate office in Mumbai on Monday as his group companies are among the big entities whose loans went bad after borrowing from the crisis-hit bank.The officials said Ambani, 60, has sought exemption from appearance on some personal grounds and he may be issued a new date.Ambani’s group companies are stated to have taken loans of about Rs 12,800 crore from the bank that turned NPAs.