BEIJING -?Shenzhen customs busted a massive electronic product-smuggling network and detained 68 suspects, the General Administration of Customs (GAC) of China said Thursday.

The case, which is still under investigation, involves more than 500 million yuan (79.37 million US dollars), the GAC said in a statement on its website.

The network employed mules to ferry electronic products, including iPhones and iPads, from Hong Kong to neighboring city of Shenzhen.

The electronic products were then sold to domestic consumers via the Internet.

In 2011 alone, the network had sold more than 100,000 units of such products, the statement said.

Shenzhen customs officials found that some of the smuggled mobile phones and tablets were secondhand and some were even electronic waste products.

The inflow of smuggled goods disturbed normal market order and harmed the interests of consumers and legal market players, according to the statement.

The country's customs will continue to crack down on smuggling to ensure market order, the statement said.