UK's competition watchdog to investigate Sainsbury-Asda merger

Aug 23 (Reuters) - UK's competition regulator is starting a formal investigation into the proposed merger of supermarket chains Sainsbury and Walmart's Asda.

The Competition and Markets Authority said it will begin the first phase of detailed assessment into how the deal could affect competition for UK shoppers.

(Reporting by Sangameswaran S in Bengaluru Editing by David Goodman)