A weekend statewide AMBER Alert was canceled after the suspect involved turned himself in with the children.
No other details have been released about the Starke County alert from the town of Hamlet.
The Hamlet Police Department requested the activation of an AMBER Alert early Saturday.
The listed victims were Ayden Mendez, 7 years old, and Yulianna Mendez, 3 years old.
The suspect was Francisco Javier Mendez, 28.