Emergency responders, with the help of a local couple, rescued a man and his 10-year-old son who had fallen through the ice while snowmobiling on a lake in Grafton on Sunday.

Michael Vento, 38, and his son, Colby, were in the frigid water at least 10 minutes, ­police estimated. Both were taken to UMass Memorial Medical Center in Worcester and treated for hypothermia, but have recovered, Grafton police said in a statement.