South Dakota has joined a legal effort asking TikTok to comply with an investigation into whether the company violated consumer protection laws.

Forty-six states have signed onto an amicus brief to put pressure on the China-based social media platform, according to Attorney General Marty Jackley.

“This action is to determine whether TikTok engaged in deceptive and unfair conduct that harmed TikTok users, especially children and teens,” Jackley said in a press release sent Monday. “The State Attorneys General want to review internal TikTok communications that are critical to multistate investigations into the TikTok.”

The brief states that TikTok failed to preserve information and provide it in a useful format to the states. The coalition has asked that the court compel TikTok to provide this information to states.

The full brief can be found here.

TikTok is facing increasing pressure over concerns it shares personal data with the Chinese government, allegations which the company denies. Gov. Kristi Noem recently banned state agencies and employees from using TikTok on state-owned devices.