Several people have been detained in Hangzhou, Zhejiang province, following new findings in a case involving the alleged illegal use of assisted reproductive technology and a related injury dispute, China Central Television reported on Friday.

According to the Linping district joint investigation and response team, a man surnamed Yan, identified as the person in charge of an illegal medical practice site, organized others to conduct assisted reproductive procedures in rented housing that had been converted into an underground laboratory.

Authorities said the facility lacked a medical license and other required operating qualifications. Those involved were also found to be practicing without the necessary professional medical credentials.

Based on current evidence, the Linping district health bureau plans to impose an administrative penalty on Yan, including the confiscation of drugs and medical equipment and a fine of 3.22 million yuan ($475,935).

The bureau has also opened an investigation into a woman surnamed Li, who is suspected of practicing medicine without a physician's qualification.

Additional leads involving Hangzhou Shengbao Medical Health Technology Co, a company linked to the case, have been transferred to municipal authorities for further investigation.

Police have launched a criminal investigation into the underground laboratory and related business entities on suspicion of illegal business operations. Three suspects have been placed under criminal detention, and the case remains under investigation.

Authorities also provided an update on a separate incident involving a woman surnamed Yang, identified as a media worker, who was injured at the scene. Police have opened an investigation on suspicion of intentional injury after a medical assessment determined that Yang sustained a legally defined Grade II minor injury. A male suspect surnamed Li, described as being associated with Yan, has been detained.

Local authorities have launched a district-wide inspection and rectification campaign and said they will continue to accept public supervision.