Anheuser-Busch InBev (ABI.BR) is asking banks to underwrite up to $70 billion in debt financing to back its potential takeover of SABMiller (SAB.L), banking sources said. The initial financing is expected to comprise bridge loans, which will be refinanced by bond issues, and longer term loans, the sources said. Banks working on the deal include AB InBev’s core relationship banks: Banco Santander, Bank of America Merrill Lynch, Bank of Tokyo-Mitsubishi UFJ, BNP Paribas, Deutsche Bank, ING, JP Morgan, Mizuho Bank, Royal Bank of Scotland, Societe Generale and SMBC, banking sources said.