Authorities in south China's Guangdong province said Thursday they found no labor law violations in a Chinese Samsung supplier that had previously been accused of using child labor.

A workshop of HEG Electronics Co.?[file photo]?

A statement on a local official website said the city of Huizhou launched an investigation after China Labor Watch alleged that the city's HEG Electronics Co. had employed children younger than 16.

The firm supplies phones and other digital products to several companies, including South Korean electronics giant Samsung Electronics Co.

The statement said that of the seven workers named by the New York-based labor rights group, two were adults and five were aged between 16 and 18 -- all above China's legal working age of 16.

The statement also said the company of 3,100 employees was not found to have imposed excessive work hours or to have withheld workers' wages.

China Labor Watch released a report on Tuesday accusing the Chinese firm of forcing child laborers to work 11 to 13 hours a day while paying them only 70 percent of the wages received by formal employees.

Samsung said Thursday that it would send a team of investigators to the factory, adding that two previous checks found no irregularities in the factory's working conditions.