(Image via South China Morning Post)

Last week, Chinese scientist He Jiankui made a startling announcement–claiming he had produced the world’s first gene-edited babies, but now he’s apparently gone missing.

According to media reports, He has been missing since last Wednesday following his controversial gene-editing experiment at a summit in Hong Kong.

Some reports have stated He is under house arrest due to his work being a violation of Chinese law but the Southern University of Science and Technology in Shenzhen, where He was an associate professor, has disputed that report. The University has distanced itself from He’s work and he has been on leave since February.

He claimed that his a gene-editing technology known as CRISPR-Cas9 could alter the embryonic genes of a pair of twin girls. His claims were met with both skepticism and condemnation.