A man was arrested for driving a limo through security gates at a Las Vegas airport while wearing a clown mask and telling police he had a "bomb" in the car.
"Our police department is working closely with the FBI to identify what appears to be a pattern...but at this point, it's hard to tell," said New Haven Mayor Justin Elicker.
Two investigations are still ongoing, and police have not yet linked any of the threats.
"Threats to our democracy must not be tolerated, and my office will work tirelessly to ensure the people who work and visit our Capitol can do so safely," Michigan Attorney General Dana Nessel.
Floyd Ray Roseberry, a native of North Carolina, live streamed video saying he had explosives that would blow up the area.
The man in the video said he was trying to get President Joe Biden "on the phone" and was discussing a "revolution."
LAX's Twitter said police officers were investigating a "suspicious item" and that its arrivals level had been temporarily closed.
The FBI reportedly aided in the investigation of the student making threats against students.
54-year-old Adele Belizaire told police that she "has anger issues" and only threatened to bomb the Hard Rock Hotel and Casino in Tampa, Florida to "blow off steam."
A possible bomb threat at Fort Lauderdale Airport in Florida has led police to close off access to the site.
Reports of a "possible explosive onboard" a United Airlines flight led to it being diverted en route from Jackson, Mississippi, to Houston.
Bomb squads were called to the scene near Cascade Medical after the sheriff's office was contacted "about a bomb threat in a garbage can," city officials reported.
"I think this is an isolated incident and we don't believe that anyone is in any immediate danger," a Dickinson Police officer said.
Authorities say Willie Littlefield called 911 to say there were explosives in a car in the parking lot of the Fellowship Baptist Church in Thonotosassa.
Police say that Luke Joseph Dell made false school shooting and bomb threat claims as part of his plan to lure police away from a bank that he planned to rob.
The teenager made two threats on Snapchat, each followed with a smiley face and bomb emoji; he could face 10 years in prison.
Jesus Castrodad, 49, and his 32-year-old girlfriend Colleen Kasdaglis were allegedly caught on Nov. 6, shortly after what authorities allege was placing what may have been their seventh bomb threat to the courthouse.
Michael Kadar, 19, began making hoax threats when he was still a minor and claimed it was "like a game" for him.
After the Parkland, Florida, school shooting, school violence incidents have increased dramatically.
The U.S. Secret Service was already familiar with the man.
A shooting survivor urges Americans to stand firmly against the NRA's "guns everywhere, for anyone, no questions asked" agenda.
Threats were phoned in or emailed to JCCs in states including New York, Wisconsin, Illinois and Florida overnight and early on Tuesday.
No one claimed responsibility for the calls on Wednesday nor nine days ago, and the Federal Bureau of Investigation (FBI) has not named any suspects nor described a likely motive.
Los Angeles Unified School District closed all their schools and campuses.