Google has reported the partial blocking of its mobile internet services in China a week after the internet firm announced that it had stopped censoring search results in China.
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Google's controversial move stems from the discovery that the company was among more than 20 US companies that were targeted by China-based cyber attacks.
According to reports, the move, which angered Chinese authorities, also led some of Google's partners in China to distance themselves from the internet firm.
The cause of the partial blocking of Google's mobile internet services is not immediately clear, according to US reports.
It is unknown whether the disruptions are the result of direct action by Chinese authorities, action by Chinese telecoms companies in support of the government, or a technical problem.
Google has not commented beyond confirming that its service availability dashboard indicates that mobile services are partially blocked from within mainland China.
The company said the availability of its mobile services had started to "fluctuate" and it was unclear whether the disruptions would continue.
However, Google's search, news and image services, which were moved to Hong Kong last week, have not been blocked, the company said.