CNN has gone ahead with plans to drop its subscription to the AP service, effective immediately.

As Bloomberg reports, the move comes after CNN was unable to reach a new deal with AP.

Starting today, CNN’s newsgathering will be the primary source of content across all platforms and services, CNN Worldwide President Jim Walton said today in an internal memo to staff. The memo was confirmed by CNN spokesman Nigel Pritchard.

“We are taking an important next step in the content- ownership process we began in 2007 to more fully leverage CNN’s global newsgathering investments,” Walton wrote.

The move lets CNN invest more into its own operation and helps it differentiate from competition, Walton said. CNN started the efforts to own all of its content in 2007, and created a wire service offering articles and videos.

The cable channel also struck a deal with Thomson Reuters Corp.’s wire service to supplement breaking news coverage, according to the memo. CNN is returning to Reuters after dropping the service in August 2007, following a price increase.

TVNewser has more on the move, including the memo to staff from Jim Walton.