Charleena Lyles, a pregnant mother of four was shot and killed by Seattle police after she confronted officers with a knife, authorities said Sunday.

The dead woman was identified as 30-year-old Charleena Lyles by family members -- who said she had four children and was expecting a fifth.

The statement provided by the Seattle police department said both officers were "equipped with less lethal force options," and that all its officers are trained in crisis intervention.