LOS ANGELES  A federal grand jury here issued subpoenas to MySpace and others last week in connection with the suicide of a 13-year-old Missouri girl after she received cruel messages from people posing as a teenage boy on the site, The Los Angeles Times reported Wednesday.

Thomas Mrozek, a spokesman for the United States attorney here, declined Wednesday to confirm that the office had issued subpoenas. The Los Angeles Times, citing unnamed sources, reported that the investigation would determine if the creation of a fake identity to harass the 13-year-old, Megan Meier, could be considered Internet fraud under federal statutes. MySpace, the social-networking Web site, has its headquarters in Beverly Hills, Calif.

After almost a year of investigation, federal prosecutors in Missouri did not press charges against Lori Drew, the woman who, along with her teenage daughter and a former employee, was accused of setting up an online account using the fake identity “Josh Evans,” an attractive 16-year-old boy, and communicating with Megan in the month before her suicide.

The Drew and Meier families live within blocks of each other in Dardenne Prairie, an affluent community northwest of St. Louis. Megan was a friend of Ms. Drew’s daughter, but the friendship cooled when the girls began junior high school two years ago. Soon afterward, “Josh Evans” appeared on MySpace and began sending messages to Megan.