A day-care operator who grew frustrated over a dirty diaper was charged Wednesday with assaulting an 11-month-old girl who suffered a stomach injury, broken leg and other injuries while in care at her Wright County home.

Prosecutors accuse Robbin K. Rollag of intentionally harming the girl while she and other children were in her care on March 6. Rollag told a child-care licensing investigator that the girl “got to me,” according to court papers.

Rollag, 48, faces six felony charges, including assault, neglect and malicious punishment of a child.

“I suspect this woman was looked upon very well by many people who brought their kids there,” said Mark Erickson, an assistant Wright County attorney. “I don’t know how to explain this.”

Rollag did not immediately return a phone call Wednesday.

She admitted to authorities that she pushed the girl down, causing a bruise to her head, court papers show. She also told them that an injury to the baby’s stomach resulted from her own frustration after the baby had a dirty diaper. She said the girl’s broken leg occurred when she tripped, dropped the girl and fell on top of her. She also admitted to pinching the girl hard enough to cause a leg bruise, court records show.

The girl’s parents grew concerned because she didn’t crawl around normally and cried whenever her mother touched her foot, court records show.

Erickson said Rollag faces up to five years in prison if convicted, but because she has no prior record she is unlikely to receive that maximum penalty.

Rollag’s day care near Buffalo, licensed since 1998, has been shut down by state regulators pending the outcome of the investigation. State officials say they have no prior licensing actions in her file; her county record could not be verified Wednesday.

Day-care providers would receive more training to deal with stressful situations under a proposal at the Legislature, according to Jerry Kerber, inspector general at the Department of Human Services. “In those settings we need to make sure the style of … interaction of the provider is not going to cross the line and be abusive,” he said.