14y-o Sydney girl missing for six days

There are concerns for a 14-year-old Sydney girl who's been missing for six days.

Police say the last confirmed sighting of Shannon Wiggins was last Thursday at Canterbury railway station in the city's southwest.

However officers are investigating reports Shannon was seen at a Belmore home a day later and outside a Canterbury school on Tuesday.

The girl's family is concerned for her welfare due to her age, and because she has medical issues, police say.

Anyone with information has been urged to come forward.