The RCMP said it was aware of email threats made across the Canada, and urged anyone who received one to exercise caution.
In the city of San Diego, police had received 36 reports of the threats as of about 3 p.m., according to the agency's public-information unit.
U.S. law enforcement authorities are urging Americans to remain calm after a massive spam campaign carrying bomb threats has scared people and caused building evacuations all day across the country.
"As always, we encourage the public to remain vigilant and to promptly report suspicious activities which could represent a threat to public safety", the Federal Bureau of Investigation said. Police were searching the area around the Johnstown Tribune-Democrat after a bomb threat was received by the newspaper.
Police on K Street near the White House told a Sputnik reporter they were "working on a bomb threat" late Thursday afternoon.
Toronto was one of several Canadian cities caught up in the threats, with police responding to "over 10" such calls Thursday. "See CRPD Facebook for more details", wrote the Cedar Rapids Police Department.
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"The problem with that thinking is - if you believe they're related and this is nonsense - then your investigation suffers and your response suffers", Const. David Hopkinson said in an interview.
I will no longer log into this email, I monitor my wallet every twenty minutes and if I receive the money I will give the command to my man to get away. "We sent police officers to the site, they searched the premises".
They are "investigating a message received by individuals in multiple locations on campus and across the state".
"We are now monitoring multiple bomb threats that have been sent electronically to various locations throughout the city", a New York Police Department's Counterterrorism Bureau statement said, according to NBC News. It said the threats appear to be part of a nationwide coordinated effort are a hoax.
L'Anse Creuse High School - North also reported a threat. Near Atlanta, people were ushered out of a courthouse.
The emails claim that an explosive device was hidden and "covered up carefully" in the building in question.
Vancouver Police Department Sgt. Jason Robillard tells CNN that businesses have received threats.