A group of people who attacked and raided a Perth grocery store after its owner detained a nine-year-old boy for shoplifting late last year are yet to be charged.

The incident was sparked when the young boy attempted to steal a bottle of Coke from the Kelmscott IGA store on Albany Highway on December 30.

The owner of the store, 41, performed a citizen’s arrest, and allegedly locked him in the storeroom.

The young boy tried to smash a window and escape the room, but suffered cuts to his head, hand and arm in the process.