K-Fed’s team serves another subpoena

LOS ANGELES - K-Fed’s team is on the attack again.

Kevin Federline’s defense team was hard at work this weekend delivering yet another subpoena — this time to the Promises rehab facility where ex-wife Britney Spears spent a month being treated earlier this year.

Kevin’s attorney, Mark Vincent Kaplan, confirmed to “Access Hollywood” an “administrative executive” at the facility was served with the subpoena on Saturday, as Kevin and his camp continue to build their case in his very public custody battle with Britney over the couple’s two kids — Sean Preston and Jayden James.

Promises is just the latest target of Kevin’s camp. Earlier this week, Britney’s former assistant Shannon Funk, former bodyguard Daimon Shippen and friend and current assistant Alli Sims were all served with legal papers.

“They are pursing all relevant evidence from every potential source and every available witness, including witnesses who might actually believe they could succeed in becoming unavailable,” a source told “Access Hollywood.”

MORE FROM ACCESS HOLLYWOOD

Access Hollywood Section Front

Billboard: Jackson had two albums in works Jackson 911 caller identified Simmons: Lambert ‘killed career’ by coming out In death, Jackson rises to top of charts again Questions swirl around Jackson’s tie to kids Fawcett’s jailed son can attend mother’s funeral Source: Once-jilted Melissa Rycroft is engaged Kendra Wilkinson, NFL beau are now wed Fawcett’s funeral to be held Tuesday Janet Jackson ‘devastated’ by Michael’s death Access Hollywood Section Front