The woman who was killed in a deadly shooting at a Southern California synagogue will be buried on Monday after being hailed as a hero, as police continue to investigate the motive of the 19-year-old suspect.

Lori Gilbert Kaye, 60, attended services at Chabad of Poway in suburban San Diego on Saturday, the last day of the weeklong Jewish holiday of Passover, to honor her recently deceased mother.

She was one of four people shot, and the only one killed, when a gunman stormed in with an assault-style rifle, six months to the day after 11 worshippers were killed at a Pittsburgh synagogue in the deadliest attack on American Jewry. Police are investigating the incident as a hate crime.