LOS ANGELES, California (X17online) - Walt Disney Studios' and 20th Century Fox's ad practices have come under fire by a watchdog group, according to The New York Times.

The Children’s Advertising Review Unit, a division of the Council of Better Business Bureaus, questioned whether Disney and Fox violated industry guidelines by advertising Pirates of the Caribbean: On Stranger Tides and X-Men: First Class, respectively, during programming meant for young children.

Both films had PG-13 ratings.

A Fox spokesperson said the Motion Picture Association of America pre-approved the challenged ads, while Disney also feels they complied with industry guidelines.

The MPAA confirmed Fox's stance. A spokesperson said in a statement Wednesday:

"Generally, a few PG-13 rated motion pictures are considered by the Advertising Administration to be compatible with children's programs. In the noted instances, the Advertising Administration approved the advertisements for the specific time and placement in which they ran.”