RICHARDSON, Texas – Police discovered the remains of a child while searching for 3-year-old Sherin Mathews on Sunday.

The Richardson Police Department announced Sunday afternoon they found the body in a tunnel beneath a road and said it is "most likely" Mathews.

Police are waiting to positively identify the remains before confirming that the body is that of the 3-year-old girl who was reported missing earlier this month.

The body was reportedly discovered a half mile from Sherin's home.

The Medical Examiner is working to determine a cause of death.

Area where body was found is about half a mile from Mathews' home. — Allison Harris (@AllisonFox4News) October 22, 2017

Authorities have not made an arrest, pending a positive identification of the body. Police informed Sherin's parents of the discovery.

Press Conference- Sherin Mathews Update 10/22 Posted by Richardson Police Department on Sunday, October 22, 2017

An AMBER Alert was issued for Mathews on Oct. 7, but was discontinued after authorities failed to find any leads in the investigation.

Sherin Mathews was last seen Oct. 7 wearing a pink top and black pajama bottoms. Her father, Wesley Mathews, was arrested the day of her disappearance and charged with abandoning or endangering a child.

According to the ABC affiliate in Dallas, WFAA, Mathews left his daughter in a backyard alley around 3 a.m. as a form of punishment for not drinking milk and when he returned 15 minutes later, the girl was gone.