OMAHA, Neb. (AP) — An anti-defamation group says it’s received hundreds of calls from Omaha residents upset over neo-Nazi books left in several Little Free Libraries.

The Plains States Region of the Anti-Defamation League says dozens of neo-Nazi books were found in outdoor book exchanges across Omaha. They say they’re working with law enforcement to combat the rise in hate speech.

Trendwood Neighborhood Association President Susie Dugan says the libraries are intended to bring the community together.

Signs encouraging citizens to report individuals living in the country illegally have also turned up on poles in Omaha neighborhoods. Residents have been taking them down.

Resident Dalila Rios says the signs are discriminatory and invite people to make false assumptions.

The Anti-Defamation League urges any residents who encounter such propaganda to report it.