The Chinese scientist who shocked the world with claims of creating the first genetically engineered babies is being detained in the Chinese city of Shenzhen, according to a report in The New York Times.

He Jiankui, a Chinese research scientist at the Southern University of Science and Technology and an entrepreneur involved in two Chinese biotech startups, made headlines and generated controversy when he announced he had used CRISPR to remove from the embryos of two twin girls born in November a gene which plays a role in enabling forms of the HIV virus to infect cells.

The international scientific community almost immediately condemned He for using the technology on human embryos and the Chinese government shut down He’s research almost immediately, according to The New York Times.

Now it appears that the government has also put He and his family under a form of house arrest.

He Jiankui who shocked the science world by announcing he created the world’s first genetically edited babies had been missing since a November conference in Hong Kong. @elsiechenyi found him under house arrest at a dorm at his university in Shenzhen. https://t.co/t1pbxplwns — Paul Mozur (@paulmozur) December 29, 2018

He is apparently under the supervision of armed guards and is staying at a housing facility typically reserved for visiting professors on the campus of the university where he performed his research.

Hotel staff and Liu Chaoyu, the co-founder alongside Dr. He of a genomics startup, Vienomics, confirmed the identity of the professor, whose whereabouts had been unknown since a public appearance in late November, where Dr. He defended his use of the CRISPR gene-editing technology.

According to the Times report, Dr. He is allowed to make phone calls and send emails. Executives at Vienomics have spoken to the scientist about company matters but could not confirm his whereabouts when questioned by reporters from the Times.