Seattle police are investigating the fatal shooting by two officers of a woman family members say was pregnant and struggling with mental health issues.

The officers went to the apartment - where several children were present - after a call Sunday morning about a burglary, police said.

At some point, the woman confronted them with a knife, and both officers shot their weapons, authorities said. The children were not injured, police said.

"The officers immediately performed first aid," but fire medics arrived and determined she had died, the police department said in a statement Sunday afternoon.

Relatives told The Seattle Times that woman was several months pregnant and had struggled with mental-health issues for the past year.

Police on Monday released a roughly 4-minute dashcam audio of the officers discussing "a safety caution" and a previous encounter with the woman before they reached her fourth-floor apartment in Seattle's Sand Point neighborhood.