Several vehicles were also damaged in the incident.
One of the injured persons, identified as Fazlu Rehman, died during treatment at the Sion Hospital on Monday morning, the official from the Brihanmumbai Municipal Corporation (BMC) said.
BEST has set up a five-member committee to investigate the Kurla accident.
Driver Sanjay More (54) is in police custody for alleged reckless driving.
In a statement issued last week, BEST said a committee, headed by Chief Manager (Transport) Ramesh Madavi, will investigate the accident. It also said that BEST would provide Rs 2 lakh each to the families of those who lost their lives and bear treatment expenses of the injured. BEST administration has claimed that More received three days’ training before he was allowed to drive the electric bus.
RTO officials suspect human error and lack of proper training for driving automatic transmission buses could be the reason behind the accident, among the most horrific involving BEST buses in recent history.