Police believe a Maryland woman killed her 2-year-old son before taking her own life on Saturday night.

A family member called 911 about 10 p.m. Saturday, asking police to do a welfare check at a townhouse on Countrywood Court in Landover, Maryland. When officers arrived, they found Yu Song, 34, and Joseph Wang, 2, dead inside the home.

Neighbors told News4 the Song's husband showed up to the townhouse and banged on the door before police came and found her and the child dead.

Neighbors said the family had recently moved out of the townhouse, but Song somehow got inside.

Investigators are asking anyone with information to call 301-772-4925. Callers wishing to remain anonymous may call Crime Solvers at 1-866-411-TIPS (8477), or go online at www.pgcrimesolvers.com, or use the “P3 Tips” mobile app (search “P3 Tips” in the Apple Store or Google Play to download the app onto your mobile device.)