Police visited the home of pop singer Britney Spears following the publication of photos showing her driving with her son on her lap.
Spears has defended driving with her son. Photo credit: X17
Los Angeles County Sheriff's Sgt Diane Hecht said officers went to the home to seek information for the Department of Family and Children Services.
But the department refused to be drawn on any possible investigation.
Los Angeles police have already ruled out bringing charges over the pictures, taken by a paparazzi photographer.
"Unless a deputy saw the violation, there's nothing we can do," said deputy Luis Castro.
"We don't even know if this took place in our jurisdiction."
Spears has defended her actions, saying she was carrying her son Sean in the front seat while she was driving only after feeling threatened by photographers.
"I instinctively took measures to get my baby and me out of harm's way, but the paparazzi continued to stalk us," she said.
It is thought her bodyguard was sitting next to her in the passenger seat at the time.
She called the incident with photographers as a "horrifying, frightful encounter".
"I love my child and would do anything to protect him," she added.
The agency which took the photos denied it had acted inappropriately in getting the shots.
In a statement X17 said the pictures were taken "in a very peaceful context, in which photographers exhibited no aggressive behaviour".
Spears, who has taken time out from recording since marrying dancer Kevin Federline, gave birth to Sean in September.