Officers responded to South Mason Loop Road tonight for a report of domestic violence and shots fired, according to Tacoma police.
When they arrived, a pit bull was at the residence.
Police told the people at the scene to keep the dog under control and contained, police spokesman Mark Fulghum said.
The dog broke free and charged toward officers, including a K-9 officer and his dog, Fulghum said, at which point police shot the charging animal and it died.
The use of force will be reviewed by supervisors, per procedure, Fulghum said.
The circumstances of the initial call were not immediately available.