MADISON, Wis. -

No one was injured after a Capitol police officer accidentally fired his weapon inside the security office at the Executive Residence Thursday night.

Department of Administration officials said the incident happened around 10:45 p.m. in the office, which is on the grounds of the residence but not inside the home.

Gov. Scott Walker and his family were not home at the time of the incident, according to the Department of Administration.

The investigation is complete and it was determined the weapon was accidentally discharged. 

The officer was a new employee who was still serving an initial probationary period and has been terminated.