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

Voting precincts in Georgia, Michigan, Wisconsin, Pennsylvania and Arizona were targeted with emailed threats, which the FBI said likely originated in Russia. None of the threats and the have been deemed credible, but did delay at least some voters from ...

"Unfortunately, when something bad happens, it is often claimed to be of Russian origin," a Russian official told Newsweek.