Three women were shot and killed and a baby wounded during a shooting early Tuesday at a Tulsa apartment complex, Tulsa police said.

OKLAHOMA TRIPLE MURDER-SUICIDE: MOM, 39, KILLS 10-MONTH-OLD BABY BOY, 6-YEAR-OLD SON AND 11-YEAR-OLD DAUGHTER

Officers responded about 6:30 a.m. Monday to a report of a triple killing at Wood Creek Apartments in east Tulsa and found three women dead inside, police said in a press release. An infant who had also been shot was found next to one of the women.

Caleb Venson

Caleb Venson has been charged with three counts of first-degree murder after shooting and killing his ex-girlfriend and two other women at a Tulsa, Oklahoma apartment. An infant at the scene was also shot, but survived. (Tulsa County Detention Center via AP)

Police say the infant underwent surgery and was expected to survive. A 13-year-old boy was inside the apartment and hid in a back bedroom when he heard the gunshots, police said, adding that Venson forced the boy out of his bedroom and "was then very remorseful of his actions." The boy managed to escape out of an apartment window and called for help, police said.

Police identified the dead women as Ashley Atwell, 38; Annaway Mackey, 20; and Sara Gonzales, 19.

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The ex-boyfriend of one of the women, Caleb Venson, was arrested on three complaints of first-degree murder, first-degree burglary and shooting with intent to kill, police said.

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Venson was being held without bond, jail records show. Formal charges had not been filed late Monday, and jail records don't indicate the name of an attorney who could speak on Venson's behalf.