The province's Special Investigations Unit has invoked its mandate after a sudden death in Waterloo early Tuesday morning.

Regional police were called to check on the well-being of a resident in the area of Columbia Street West and Phillip Street shortly after midnight. Officers responded to the call and a male was pronounced dead shortly after.

Police notified the SIU, and the unit invoked its mandate.

Officials with the Waterloo Regional Police Service said they can't provide any further information, since it is now under investigation by the SIU.

A news release from the SIU said the incident involved a 27-year-old man. They said officers were called to a condo building in the area of Columbia Street West and Phillip Street.

"Officers went to the apartment unit and located the man on the ground below. He was pronounced deceased at the scene," the SIU release said.

Three investigators and two forensic investigators were assigned to the case. The SIU release said a post-mortem is scheduled for Wednesday.

Anyone with information, including video or photos, is asked to contact the SIU at 1-800-787-8529 or online.