Google's YouTube and a company called Live Digital have complied with subpoenas to turn over the identities of their users who illegally uploaded episodes of Fox series 24 and The Simpsons, Internet News reports.

"We intend to use the information provided to pursue all available legal remedies against those who infringed our copyrights," said 20th Century Fox Television Vice-President of Media Relations Chris Alexander.

Fox says it found four episodes of the series 24 on YouTube before the episodes debuted on the network. Episodes of The Simpsons also appeared on YouTube; 12 episodes were uploaded by the YouTube-user named "ECOTotal." Episodes of the Fox shows were placed on Live Digital by user "Jorge Romero."

The U.S. District Court for the Northern District of California on Jan. 18 granted the identical subpoenas, which were based on the Digital Millennium Copyright Act; L.A. law firm Loeb & Loeb filed them on behalf of Fox. The subpoenas were served on Jan. 24, ordering Google and Live Digital to produce the identifying information.