ST. PAUL — Federal authorities said Wednesday that recent threats to two Jewish community centers in Minnesota are being investigated as hate crimes as part of a broader probe into similar threats made nationwide.

FBI Special Agent in Charge Rick Thornton said that since Jan. 3, more than 140 telephone threats had been made to Jewish centers, groups or other facilities in 43 states and overseas. That includes threats made Jan. 18 to the Sabes Jewish Community Center in St. Louis Park and Feb. 20 to the St. Paul Jewish Community Center.

In each case, the caller’s voice is altered and the threats referenced a bomb or explosive material in the facility. Thornton said no bombs or explosives have been found.

“We will not tolerate this sort of … criminal activity,” Thornton said.