A Pittsburgh mail carrier was arrested last weekend for stashing thousands of pieces of undelivered mail in his house.

Special federal agents raided the home of Post office employee Sean Troesch and found at least eight large garbage bags filled with undelivered mail.

Special agents from the United States Postal Service took Troesch into custody last Sunday evening, according to CBS Local.

Troesch was arrested at his home on Meadowcrest Road in Pittsburgh, CBS said.

The United States Postal Service Office of Inspector General said its agents acted on a tip. In a statement, the service added that they found a wide range of mail hidden in the home.

“Special Agents recovered several different classes of mail, including business mail, flats, and small amount of first-class mail. We expect to perform a piece count of the mail tomorrow, and make arrangements to have to mail delivered to customers as soon as feasible,” the statement said.

Neighbors told the media that Troesch put out black bags like those taken into custody on garbage day for months.

The Office of Inspector General reported that it has turned its findings over to the U.S. Attorney’s office for a criminal investigation.

The service did not say specifically if mail-in ballots were among the undelivered mail, but it is highly likely.

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