Detectives from the Arson and Explosive Squad are investigating following an incident in Black Rock earlier this month that left a woman with burns on her upper body, Victoria Police say.
A 21-year old Kerang woman was walking along the beach with a 37-year-old Clayton man near Half Moon Bay about 10.40pm on Saturday, 18 March.
The woman walked ahead and saw a basketball in the sand.
As she went to pick it up, it exploded, leaving her with burns to her face, head and forearms.
She then rushed to the water to try and cool down and was later transported to hospital by paramedics.
Police were told a group of males had possibly rolled the ball towards the woman and then walked away.
An exploded basketball was located by police at the scene.
At this time the reason for the explosion is unknown and police are not sure whether the group had intended for anyone to pick up the ball or why the group had it at the beach.
It’s believed the ball may have had sparklers or similar attached to it.
Anyone with information about the explosion is urged to contact Crime Stoppers.