DAVID HARDEN/Arizona Daily Wildcat Paramedics take Sebastian Walas to University Medical Center Friday morning. Walas' 9-year-old son called police earlier that day to report that Walas had fired shots inside their house. Police say he killed his girlfriend, Karla Hackeburn, before turning the gun on himself.

A 26-year-old man killed his girlfriend and shot himself at a campus-area home Friday morning, a police spokesman said.

The couple's 9-year-old son called 911 just after 7 a.m., saying that his father was shooting a gun in their home in the 1400 block of East Elm Street, Tucson Police Department Sgt. Marco Borboa said.

After attempting to contact the people inside the home for nearly three hours, a SWAT team entered just before 10 a.m. They found Karla Hackeburn, 29, dead from a gunshot wound and her boyfriend, Sebastian Walas, suffering from life-threatening injuries from what is believed to be a self-inflicted gunshot wound.

Walas was taken to University Medical Center, and received treatment. UMC officials were unable to release his status Sunday, as he was not in the hospital directory.

The child is currently staying with family, Borboa said.

No students or University of Arizona-affiliated people were involved in the incident, but three UA departments were briefly evacuated while the SWAT team was outside.

Employees from the departments of Risk Management and Safety, Radiation Control and Facilities Management were asked to leave their buildings Friday morning, according to an e-mail released by UA spokeswoman Sharon Kha.

Borboa said seven homes were also evacuated from the area, which is about four blocks north of East Speedway Boulevard and one block west of North Cherry Avenue.

Domestic violence detectives are investigating the incident. Borboa said the last domestic violence-related homicide in Tucson was in July.

He also said he could not recall when the last homicide in the university area occurred.

"I don't think there's been one in recent memory," he said.