Regulators investigating whether Graco took too long to report problems with child car seats

The National Highway Traffic Safety Administration says it is investigating whether Graco took too long to report a safety defect in its child car seats.

Graco Children's Products Inc., a division of Atlanta-based Newell Rubbermaid Inc., recalled more than six million car seats this year because their buckles could get stuck. That could put a child's life at risk in an emergency. It is the largest child seat recall in U.S. history.

Federal rules require a manufacturer to report a safety defect within five days of becoming aware of it. If the investigation finds the company failed to report the defect in a timely manner, the company could face up to $35 million in fines.

A Graco representative could not be reached immediately for comment Monday.