File photo of the Beijing-based paramilitary hospital. [Photo: weibo.com]

An investigation is underway into the Beijing-based paramilitary hospital that was blamed for the death of college student Wei Zexi.

The country's top health administration says it has joined hands with authorities from the military and the armed police to conduct the probe into the Second Hospital of Beijing Armed Police Corps.

The latest probe comes after the state cyberspace watchdog sent a taskforce to search giant Baidu amid debate over the roles Baidu and the hospital played in the student's death.

We Zexi was diagnosed with synovial sarcoma, a rare form of cancer, in 2014 and had been undergoing a controversial treatment, which was advertised on Baidu by the hospital.