Hotbit Crypto Exchange has suspended trading, deposits, and withdrawals from their service. The news comes after a number of Hotbit senior management have been subpoenaed, according to a Hotbit press release. According to Hotbit, a former Hotbit management employee who left Hotbit in April was involved in a project last year. This project goes unnamed in the release, however, law enforcement is investigating said project for criminal activity. Hotbit claims the project was against their internal principles and unknown to them at the time.