Nov 26, 2013 9:27 AM
DALLAS - Authorities are trying to determine what caused a weekend apartment fire in Dallas that killed a boy and his little sister, plus left two relatives hurt.
The Dallas County Medical Examiner's Office on Tuesday identified the victims as 5-year-old Yenfry Nathaniel Jimenez and 3-year-old Natalie Martinez.
Investigators say the boy was dead at the scene on Sunday. The girl died hours later at a Dallas hospital.
Authorities say another sibling and the children's mother were hurt in the blaze. Their names and further details on their conditions weren't immediately available.