Mother arrested after 3-year-old boy found dead inside Tacoma apartment

TACOMA, Wash. - Tacoma police are investigating after a 3-year-old boy was found dead inside an apartment Sunday night. 

At about 7:30 p.m., officers responded to a report of an unresponsive child who was "cold to the touch" in an apartment on South Mason Avenue.  

When police arrived, officers went inside the unit and found the child. 

Investigators said after attempts of life-saving measures, the child was declared dead at the scene.

"Whenever you have a victim of a young child, Whether it be 3 or 14, it has a huge impact on the department, on fire department personnel, on the child’s family, on our community," said Wendy Haddow, the spokesperson for the Tacoma Police Department. 

Tacoma police arrested a 25-year-old woman at the scene and booked her into the Pierce County Jail for second-degree murder.

Another child was inside the home and was placed into protective custody. 

Tacoma Police told FOX 13 that the woman arrested was the toddler's mother. 

The toddler is the third child killed in Tacoma this year. There have been five homicides for the year, altogether. 

It's unclear what led up to the child's death. 

This is a developing story. 

The investigation remains ongoing.