Mumbai BEST Bus Crash Kills 4: 'Human Error' Suspected, Vehicle Mechanically Sound

• Four killed, 10 injured in a BEST electric bus crash near Bhandup (West) station in Mumbai.
• Initial probe points to "human error" as the cause; the Olectra Greentech bus was found mechanically sound by Wadala RTO.
• Driver Santosh Ramesh Sawant (52) arrested for negligent driving; sources suggest panic led to pressing accelerator.
• The 6-year-old bus had valid fitness certificate and insurance; battery packs were recently replaced.
• This is the second fatal accident involving an Olectra wet-leased BEST bus, following a similar incident in Kurla.

Why It Matters: Mumbai BEST bus crash killing 4 likely due to human error, not mechanical fault.