Google said it has detected malware targeting Vietnamese-language users opposed to bauxite mining in the Communist country.

The malware infected the computers of "potentially tens of thousands of users" who downloaded Vietnamese keyboard language software, Google Security Team member Neel Mehta wrote on the company’s security blog. The attacks targeted opposition to the mining of bauxite, an ore used to make aluminum.

The Committee to Protect Journalists is condemning the recent arrests of online journalists and political bloggers in Vietnam.

The crackdown comes as online journalists and bloggers independent reporting challenges Vietnam’s tightly censored state-run media’s monopoly on local news and opinion.