Bomb threats prompted the evacuation of schools and government buildings for a second day on Friday in an Ohio community that has been the focus of unwanted attention after former President Donald Trump amplified false rumours that Haitian immigrants are abducting and eating pets.

An emailed threat said bombs had been planted in the homes of Springfield's mayor and other city officials, said Karen Graves, a city spokesperson. A second email said that bombs would be detonated at locations including Springfield City Hall, a high school, a middle school, two elementary schools, a local office of the Ohio Bureau of Motor Vehicles and a licensing bureau.

The buildings were evacuated, and authorities with explosive-detection dogs swept and cleared them, officials said.

"We are committed to the safety and well-being of our community and take all threats to public safety with the utmost seriousness," Graves said. “We are currently collaborating with the Dayton office of the Federal Bureau of Investigation to determine the origin of these email threats."

The Springfield City School District said in a statement Friday that “all threats to the Springfield City School District are taken seriously and will be prosecuted at the highest levels. The district's messaging to families continues to be one of gratitude for their patience and understanding as our Wildcat Family navigates these events."

The threatening emails referenced an influx of thousands of Haitian immigrants into the predominantly white, blue-collar city of about 60,000, about 45 miles (72 kilometres) from the state capital of Columbus.

At Tuesday's presidential candidate debate with Vice President Kamala Harris, Trump repeated debunked claims about Haitian immigrants eating cats and dogs. Trump's comments echoed similar claims made by his campaign, including his running mate, Ohio Sen. JD Vance, and other Republicans.