Five youths have now been arrested in relation to the fatal stabbing of a Queensland grandmother.

70-year-old Vyleen White was allegedly attacked on Saturday evening, after shopping with her six-year-old granddaughter.

A 16-year-old has been charged with her murder.

Another 15-year-old has been charged with unlawful use of a motor vehicle, and police have not ruled out further charges.

Detective Acting Superintendent, Heath McQueen, described the incident as “callous, cowardly and violent.”