MIAMI LAKES, Fla. (WFLA/NBC News Channel) — A Miami Lakes neighborhood was shaken by violence Tuesday night after a man shot his two children before killing himself in a domestic dispute, police said.

According to a report by NBC affiliate WTVJ, Miami-Dade police said the double murder-suicide began as a domestic dispute.

Police said the mother of the children tried to contact her ex-husband since it was becoming late on a school night, but did not get a response.

Witnesses said the woman eventually tracked her children to a park across the street from her home on Miami Lakes Drive.

According to police, the mother was inside the home around 9:30 p.m. when her ex-husband shot their 9-year-old son and 12-year-old daughter before killing himself just outside.

Neighbors said they heard the mother screaming for help.

“I ran out of the house,” resident Madga Peña said. “I bolted over there because I just heard the screaming, the screams were really horrible, they were horrible the screams.”

Peña was with the mother as they gave chest compressions to the children in an attempt to revive them.

“ I saw the man’s body there, I saw the little girls body there in the mom was trying to do compressions on the little girl and her body towards the son’s spot she can pull her body towards the son’s body to bring them closer… and she herself started doing chest compressions,” she said.

Despite the mother’s efforts, she could not save her children. Police have not identified the victims or suspect in the situation.

It is unclear if the ex-husband lived in this area,

Miami-Dade Police Director Alfredo Ramirez called the deaths “senseless” in a post on Twitter.

“My deepest condolences to the family of the victims,” Ramirez said.