A low-intensity blast was heard on the Mumbai-Ahmedabad Highway around 10 am on Wednesday, near Dahisar's Thakur mall. As the traffic signal near the mall turned green, bikers began crossing the junction towards Mumbai when they heard an explosion and saw smoke emitting from the source of the sound. A biker soon found broken pieces of plastic and some ball bearings near the road divider and immediately informed the police.

The Kashimira Police rushed to the spot and informed other agencies — Bomb Disposal and Detection Squad, Anti-Terrorism Squad, Anti-Terrorism Cell and the local crime branch — who reached the spot with a forensic team and began investigation.