The FBI did not identify the states in question, but Georgia Secretary of State Brad Raffensperger said that the state’s election process had snuffed out some bomb threats that he said came from Russia, AP reports.

Officials in Fulton County, Georgia, said they received “multiple calls” and the threats forced a brief closure of two polling places.

The bomb threats were among multiple disturbances that US officials are tracking.

But Cait Conley, a senior adviser to the director of the Cybersecurity and Infrastructure Security Agency, told reporters on a call there were no national-level security incidents that were threatening to disrupt the election on a wide scale.

Officials continue to warn of what they say is an unprecedented level of foreign influence and disinformation that they expect will persist beyond Election Day.