An administrative staff member accidentally posted a ‘Respect Quote of the Day’ before checking the source of the quote," Indianola Superintendent Ted Ihns wrote in the email.

"I first want to apologize for the oversight," Ihns added. "While it was completely unintentional, I understand that some of those who saw the quote and realized the source were offended."

In an email shared with the Des Moines Register, the Indianola Community School District apologized for using a quote by Heinrich Himmler — a high-ranking Nazi considered to be the architect of the Holocaust. The quote "My honor is my loyalty" was the "Respect Quote of the Day" that was shared over Indianola Middle School's public address system and in an email to families on Monday, KCCI reported.

The phrase was used in Nazi Germany by the Schutzstaffel or SS, the Nazi Party's paramilitary group, to show their loyalty to Adolf Hitler. The school district later apologized to families in an email, saying that a "staff member did not realize that the quote was from a highly inappropriate source."

"This morning (Nov. 20), an administrative staff member accidentally posted a Respect Quote of the Day before checking the source of the quote," Indianola Superintendent Ted Ihns wrote in the email.

"I first want to apologize for the oversight," Ihns added. "While it was completely unintentional, I understand that some of those who saw the quote and realized the source were offended."

Ihns said district officials plan to implement a new process for double-checking the quotes going forward. He did not give details on what the change would include.