Police in the town of Greece say Cory Denoncourt was building snow forts with a friend at an apartment complex Wednesday when the snowbank he was playing on collapsed.
Several children from the apartment complex helped pull him out, while another child ran for help.
Police say the boy was taken to a hospital in critical condition and died Thursday night.
Greece school officials say a crisis team will be available Friday at Denoncourt's elementary school.
Police are urging children to use caution when playing on big piles of snow and to never play alone.
