TUCSON, Ariz. (AP) — A sheriff’s investigation into last week’s death of a 9-year-old girl at a Tucson elementary school found no evidence of any criminal violations.

The girl, whose name has not been released, died Nov. 17 after she was struck by a heavy metal gate at Centennial Elementary School.

School district officials said she was helping close the gate at the end of the school day when it disconnected from its support and fell on her.

Deputies and paramedics responding to the school tried to revive the girl, who later was pronounced dead at a hospital, the Pima County sheriff’s office said. It said in a statement late Tuesday it has concluded it’s investigation.

“At this time no criminal violations have been identified,” the sheriff’s office said. No other details have been released.