
US pop star Britney Spears' lawyers in her custody battle with ex-husband Kevin Federline are quitting.
The law firm Trope and Trope asked a Los Angeles court to be relieved as Spears' attorneys.
The firm said there has been a "breakdown" in communication with the singer that makes representing her "impossible", according to the filing obtained by CelebTV.com.
A message left with a publicist for Spears' record label was not immediately returned.