An Indianapolis postal carrier was slain on Monday, and a colleague said the fatal shots came from a house to which mail delivery had been halted because of aggressive dogs.

Angela Summers, 45, was found with a gunshot wound to her chest around 4 p.m. Monday. She had been delivering mail on her route and was shot as she approached a resident’s door.

That resident told the Indianapolis Star that she went outside to investigate a loud noise and found Summers lying on the porch, bleeding, alongside the items she had dropped: mail, a can of pepper spray and a bottle of hand sanitizer.

The resident said she sat with the woman and held her hand until paramedics arrived. Summers was pronounced dead at a hospital.

Police announced Wednesday morning that an arrest had been made, but they did not name the suspect or give any details. (Update: Later Wednesday, the U.S. Postal Service identified the suspect as Tony Cushingberry, 21.)

Paul Toms, a representative of the National Association of Letter Carriers, had told TV station WISH on Tuesday that the gunfire came from a house that was no longer receiving mail.

“There was an issue with the dogs at that residence,” he said. “And you give three letters [of warning], and on the third one we curtail the mail.”

Delivery had been stopped at that home about two weeks ago, he said, requiring the residents to pick up their mail at the post office.

The Indianapolis Star reported that Summers had posted recently on Facebook about being threatened by a family after she stopped delivery to their house because of a dog problem. It is not clear, though, that the posts refer to Cushingberry’s house.

Summers, the mother of a teenage girl, had been a postal carrier for about two years. Residents on her route described her to WISH as always smiling — and frequently offering treats for the neighborhood dogs.