05/29/2009 at 02:00 PM EDT
Jon and Kate Gosselin are going through a difficult time in their marriage – and now they may have even more trouble to deal with.
The Pennsylvania labor department is investigating whether the hit TLC show Jon and Kate Plus 8
is complying with the state's child labor laws
, a spokesman tells PEOPLE.
"I can confirm that our bureau of labor law compliance is conducting an investigation as they do whenever they receive a charge," said Christopher Manlove, a spokesman for the Pennsylvania Department of Labor and Industry.
Manlove would not say who filed the complaint, when it was filed or what the exact allegations are. "Because the case is ongoing I can't discuss the content of the investigation," he said.
In response to the investigation, TLC released a statement Friday saying, "TLC fully complies with all applicable laws and regulations. Jon and Kate + 8
is no exception. For an extended period of time, we have been engaged in cooperative discussions and supplied all requested information to the Pennsylvania Department of Labor. We will continue to engage the appropriate officials and meet any standards or regulations that are applicable to TLC productions."
The hit show follows the daily lives of Jon, Kate and their eight children.