A toddler was just seconds away from serious injury or even death when an explosive device disguised in a beer can was hurled into a crowd of people gathered at the St Kilda Festival last week.

The little girl had been dancing to a live band just 10 seconds before the home-made explosive was thrown from the beach into the crowd and detonated where she had been standing.

Injuries suffered by a person hurt in the St Kilda Festival explosions. Credit:Police

Shrapnel from the device hit festival-goer Jean-Karl Joyram in the leg, severing two tendons and leaving a two-centimetre piece of metal embedded in his calf.

A woman was also hit by shrapnel in the February 13 attack, which police have linked to an earlier explosion on the day that left two other people with wounds.