The original reports said the out-of-date milk powder was being sold by a Shanghai-registered trading firm, Jiang Di International Trade Co, not Jiawai, which was elsewhere in the distribution chain.
Not all of the 276 tonnes of milk powder had been sold through the online channels, those reports said.
Fonterra's Teh-Han said the company has severed links with Jiawai.
"It is our understanding from reports that part of the current investigation in China relates to Fonterra product that a former Jiawai employee may have onsold to others prior to our contract with them," he said.
"Because we aren't part of the official investigation we have very limited access to the real facts and need to be overly cautious, as a result, we've suspended Jiawai's status as an authorised distributor. It's important to remember that in this case, Jiawai was not one of our authorised distributors at the time of the alleged activity."
Teh-Han added "we fully support" the actions of Chinese authorities "who have acted strongly and swiftly to investigate and arrest the people they believe are responsible for this.
"Our normal process in any event of this nature is to confirm our own systems are robust, which is underway." Among those implicated is Jiawai's former general manager, Minggang Liu.