NEW YORK - Police say a man involved in a custody dispute who was supposed to turn his 3-year-old son over to the boy's mother instead threw the child off the roof of a 52-story Manhattan building before jumping to his death.

Police say they received an emergency call around noon yesterday about two jumpers. Officers found 35-year-old Dmitriy Kanarikov and his son on the lower rooftops of two nearby buildings.

The Brooklyn man was pronounced dead there and his son, Kirill Kanarikov, was pronounced dead at a local hospital.

Officials say the boy's mother, who lives in Bergen County, had custody of the child. They say that the father had visiting rights and was supposed to hand the boy over to the mother at a police precinct yesterday afternoon.

Police say Kanarikov didn't live in the building.

AP wire services contributed to this report.