Samsung Electronics has said it will investigate claims that one of its suppliers hired child workers.
New York-based campaign group Child Labor Watch (CLW) alleged its investigators found evidence of the violation while working at a factory owned by China's HEG Electronics.
It said seven under-16-year-olds were identified between June and July.
But Samsung said it had found no evidence of an employment law breach when it carried out its own checks.
"Samsung Electronics has conducted two separate on-site inspections on HEG's working conditions this year but found no irregularities on those occasions," it said in a statement.
"A team of inspectors consisting of Samsung personnel from Korea headquarters will be dispatched to Huizhou, China on August 9, and it will immediately launch an investigation and take appropriate measures to correct any problems that may surface."
CLW said its investigators had limited contact with the factory's other departments and there could be dozens more underage employees.