Google Inc. said in a post last week on its security blog that software known as “malware” was used to snoop on opponents of a controversial bauxite mine planned for Vietnam's Central Highlands. It said the cyberattacks had targeted “potentially tens of thousands of people.” Google didn't say whom it suspects of the attack.

“The comments are groundless,” Foreign Ministry spokeswoman Nguyen Phuong Nga said of the blog posts. Nga's statement appeared on the Foreign Ministry Web site late Monday.