DALLAS, Texas — A mother fatally shot her 8-year-old daughter before turning the gun on herself in an hours-long stand off in Dallas early Monday morning.

The Dallas Police Department initially responded to a domestic violence call at a residence in the 500 block of Highcrest Drive around 12:35 a.m. on Monday, May 18, 2020.

When police arrived at the scene, they met a male victim outside of the residence who told them he was in a verbal altercation with the suspect, a 35-year-old black female. The victim says the suspect became upset and started shooting a firearm at him, he then ran outside and called 911.

Police had also found, upon their arrival, that the female suspect had barricaded herself inside the house with her two children — a 12-year-old boy and eight-year-old girl. The officers notified SWAT and they arrived on scene at approximately 1:54 a.m.

When SWAT arrived, they made contact with the suspect and began negotiation attempts for her to release the children and surrender, according to the Dallas Police Department in a Monday morning update. At approximately 2:50 a.m., the 12-year-old boy was able to leave the house but, the 8-year-old female victim remained inside the residence.

At approximately 6:25 a.m., and after several more failed attempts to get the suspect to surrender, SWAT made entry into the residence. As they entered the residence, the suspect fired multiple shots and grazed one officer in the arm. Officers did not return fire and retreated from the residence, according to the department.

At approximately 9:05 a.m., the SWAT team made a second entry into the residence and found the suspect and the 8-year-old girl deceased of an apparent murder-suicide.

The injured SWAT officer is in "good condition," according to the department.

The investigation remains ongoing.