The FCC in the US has launched an inquiry into Apple and AT&T over the rejection of Google's Voice application from the App Store.

In a move that is likely to have massive ramifications if an FCC filing finds in favour of Google, the Federal Communications Commission has sent letters to the three companies asking why Google voice was denied and other "third party applications removed from the store", the Dow Jones newswire is reporting.

In a statement, Genachowski said the FCC "has a mission to foster a competitive wireless marketplace, protect and empower consumers, and promote innovation and investment". The inquiry letters "reflect the Commission's proactive approach to getting the facts and data necessary to make the best policy decisions".

We will keep you posted.