Baidu shares closed down almost 8 percent Monday after Chinese news outlet Sina reported the company's CEO, Robin Li, would be summoned by Chinese authorities over the death of a student.
China's Internet regulator said on Monday it would send an investigation team to Chinese search leader Baidu over the death of a university student, who had used the search engine to look for treatment for his cancer.
Wei Zexi, 21, died last month of a rare form of cancer.
He had turned to Baidu to look online for the best place for treatment, finding a department under the Second Hospital of Beijing Armed Police Corps that offered an experimental form of treatment that ultimately failed, according to state media.
Before dying, Wei had posted criticism online accusing Baidu of promoting false medical information, as well as the hospital for misleading advertising in claiming a high success rate for the experimental treatment, state radio said.