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 U.S. saw a rash of discredited bomb threats called in at polling places in multiple states on Election Day, in some cases spurring the need for extended voting hours. Faulty bomb threats were called into at least five states,

Hoax bomb threats, many of which appeared to originate from Russian email domains, were directed on Tuesday at polling locations in five battleground states - Georgia, Michigan, Arizona, Wisconsin and Pennsylvania - as Election Day voting was underway,