The Boston Police Department announced the death of an active-duty officer who’d served the department for nearly 20 years. Detective Mark G. Walsh died on Thursday, Feb. 20, according to a statement from Boston Police. His cause of death was not revealed.

VBPD is currently investigating a shooting that investigators confirm, has taken the life of an officer and seriously injured another.

The police department asked the public for patience as it works on the investigation and "grieve the loss of their own."