July 1 (Reuters) - The U.S. Federal Trade Commission has

launched an in-depth investigation into SoftBank Group Corp's

purchase of semiconductor designer Ampere Computing

LLC, Bloomberg News reported on Tuesday.

The probe, known formally as a second request for

information, is a follow-up inquiry into the deal and suggests

that the acquisition may undergo an extended government review,

according to the report.

Reuters could not immediately verify the report.