Colorado Springs police officers called out to a mobile home park Tuesday night found a man, woman and two young children dead in what investigators described as a murder-suicide.

The four were found about 7:45 p.m. on the 3200 block of El Morro Road in the city’s southeast corner. Officers were dispatched to the address to complete a welfare check.

“These are very, very difficult scenes not only for the police officers, but for the dispatchers, our crime scene techs,” said Lt. Howard Black, a police spokesman. “These are very, very difficult scenes especially when you throw young children into the mix.”

The El Paso County Coroner’s Office completed autopsies on Wednesday and identified the victims as: 26-year-old Lucero Badillo Castillo; a girl, Laela Barcenas’ Badillo, 5; and a boy, Rodolfo Barcenas’ Badillo, Jr., 8. All three are residents of Colorado Springs. The cause of all three deaths is by gunshot wounds. The manner of their deaths are homicides.

The man was identified as Rodolfo Barcenas’ Alcantara, 29, also a resident of Colorado Springs. He also died of a gunshot wound. His manner of death has been ruled a suicide.

The Colorado Springs Police Department’s Violent Crimes Section/Homicide Unit is investigating the deaths.

These deaths represent the second, third, and fourth homicides of 2017. Last year at this time there were no homicides in Colorado Springs.