An already heated presidential race faced further strain from a string of reported bomb threats in battleground states—causing some delays on Election Day.

ToplineVoting in multiple battleground states was disrupted on Tuesday as numerous polling places received death threats, many of which the FBI said it determined had ties to Russia, prolonging polling place hours and raising the specter of election interference.

A man at the U.S. Capitol was arrested and several stated received bomb threats that were deemed non-credible, according to authorities.