According to TMZ, police were called to Blac Chyna and her new boyfriend Kid Buu's hotel room in Hawaii after the two got into a physical altercation. 

The incident reportedly took place around 5 am, when Blac Chyna accused Kid Buu of cheating on her, and around 7 am things turned violent. Blac Chyna allegedly scratched Kid Buu during the incident, and he retaliated by slamming her against the wall and choking her. 

Neither Chyna or Kid Buu were arrested or taken to the hospital following the incident. 

Source: TMZ