A granddaughter of the late Robert F. Kennedy and her young son are presumed dead after a canoe accident on the windy Chesapeake Bay Thursday afternoon.

Former Maryland Lt. Gov. Kathleen Kennedy Townsend says authorities have shifted from a “rescue” search to a “recovery” search as they look for her daughter, Maeve Kennedy Townsend McKean, and grandson Gideon Joseph Kennedy McKean, according to the Associated Press.