JYP Entertainment's official website has been brought offline by a distributed denial-of-service (DDoS) attack. 
The cyber attack began on Jan. 16 at 5 P.M. KST and the site is still down as of Jan. 19. 

JYP made a statement to Yonhap News on the day of the attacks.

"The site has been going offline intermittently ever since Tzuyu made her apology," the entertainment agency said. "In the afternoon on the 16th, multple users from unspecified and random IP addresses all connected to the site at the same time. We believe this is a DDoS attack."

Unfortunately, they are unsure how to stop the attacks. "However, it is impossible to know where the attacks are coming from."

JYP is also in the process of getting the website working again as they are "currently attempting to bring the site back online, but it may take a while."

Taiwanese activist hacking group "Anonymous Tw" has claimed responsibility for the attacks in response to Twice member Tzuyu's apology. In the apology video, she stated that China and Taiwan are one country and that she does not support Taiwanese independence. 

"Anonymous Tw" demanded an apology from JYP in a Facebook post made on Jan. 18.  They have also  threatened to continue their cyber attacks until JYP capitulates.