PHILADELPHIA (CBS) — Police say a woman shot and killed her husband and two daughters, and then tried to kill herself Monday night in the Tacony section of Philadelphia. Police were called to the home on the 6300 block of Hegerman Street around 10 p.m. after a next-door neighbor reported hearing gunshots.

Neighbors say they heard about five to seven shots ring out.

Police say the 28-year-old mother killed her 10-month-old and 4-year-old daughters. The woman’s 38-year-old husband was also shot and killed, according to police.

Acting Philadelphia Police Commissioner Christine Coulter described the shooting as an attempted murder-suicide.

“They found four people shot. One male was shot in the head,” Coulter said. “She [the mother] was found with a gun under her.”

The 28-year-old mother is the lone survivor, after surviving her own alleged self-inflicted gunshot wound. Medics rushed her to Frankford Torresdale Hospital where she is in critical condition.

Her 4-year-old daughter died shortly after the shooting and her 10-month-old daughter died at St. Christopher’s Hospital for Children overnight.

“Clearly tragic that there were children involved in this. It’s never easy seeing a child with a gunshot wound. The officers who responded blocked every intersection on the way to the hospital, doing everything they could in an effort to help save their lives,” Coulter said.

It’s not clear where in the home the shooting happened.

Police have not released the names of the victims and there is no word on what sparked the incident.

An investigation continues.

CBS3’s Greg Argos and Chantee Lans contributed to this story.