A 9th victim of the San Jose mass shooting has died. Now investigators are focused on why it happened.

(CNN)The nine victims of a mass shooting in San Jose on Wednesday have been identified as investigators begin the process of figuring out why such a fierce burst of violence happened during the early morning hours at a light rail yard.

Eight of the victims, who ranged from ages 29 to 63, were identified Wednesday by the Santa Clara County office of the Medical Examiner-Coroner as Paul Delacruz Megia, 42; Taptejdeep Singh, 36; Adrian Balleza, 29; Jose Dejesus Hernandez III, 35; Timothy Michael Romo, 49; Michael Joseph Rudometkin, 40; Abdolvahab Alaghmandan, 63; and Lars Kepler Lane, 63.

A ninth victim, Alex Ward Fritch, age 49, was transported to Santa Clara Valley Medical Center in critical condition and died Wednesday evening, the coroner's office said.

They will be honored Thursday night at an event at the San Jose City Hall Plaza.

Among the victims were the gunman's coworkers at the Valley Transportation Authority (VTA). The VTA is a public transit service that operates bus and light rail services in the Santa Clara Valley and employs about 2,000 workers.