LOS ANGELES (AP) — A nurse who was badly injured after being attacked at a Los Angeles transit bus stop has died of her injuries, her employer announced Sunday.

“We are deeply saddened by this news,” officials with LA County-USC Medical Center said in a statement. “Sandra Shells will forever be remembered for her compassionate care and unmatched dedication to her patients and her community throughout her 38-year career at LAC+USC.”

Los Angeles County Supervisor Kathryn Barger has called for a full investigation into Thursday’s assault at downtown’s Union Station, arguing that essential workers who are already working in tough conditions during the pandemic deserve a “more safe and stable environments.”

The Los Angeles Times reported that a homeless man was arrested not far from the station and booked for investigation of attempted murder.