These threats have, in some cases, delayed voting and thus delayed counting,” Easterly said. She described the threats as “one of many disruptions … within an incredibly complex event that involves hundreds of thousands of election workers and tens of thousands of polling places.

An already heated presidential race faced further strain from a string of reported bomb threats in battleground states—causing some delays on Election Day. The FBI said in a statement it was aware of the threats, many of which originated from Russian ...