China is preparing for a potential probe into how Apple deals with developers, including taking a 30% cut on in-app spending, according to a report.

Apple stock fell Wednesday after Bloomberg reported that the Chinese government is exploring the launch of an antitrust probe into the company’s policies.

China's antitrust watchdog is examining Apple's policies, including taking a cut of up to 30% on in-app spending and barring external payment services and stores. The agency has spoken with Apple executives and app developers since last year,