Google on Wednesday demanded that Microsoft yank its YouTube app for Windows Phone from the market and disable any downloaded copies of the app, according to Wired.com, which received a copy of Google's cease and desist letter.
Microsoft has until May 22 to comply, according to the story by Wired's Mat Honan.
The Microsoft-written YouTube app violates YouTube's service terms in two ways: it strips out the ads in the videos and lets users download content from the video site. Users can download the Microsoft app from the Windows Phone App Store.
"These features directly harm our content creators and clearly violate our Terms of Service," according to Google's letter. "We request that you immediately withdraw this application from the Windows Phone Store and disable existing downloads of the application by Wednesday, May 22, 2013."
"Just today, during his presentation at the Google I/O keynote, Google CEO Larry Page decried Microsoft for "milking off" of Google's innovations," Honan writes.
The Wired story includes the full text of the letter, dated May 15. It was sent to Todd Brix, Microsoft general manager, Windows Phone apps and store. It was signed by Francisco Vareta, director, global platform partnership, for Youtube.
Wired contacted both Google and Microsoft for comment. As of this posting, Wired apparently has received none.
Sign up for CIO Asia eNewsletters.