Updated at 4:45 p.m.

Portland City Hall was evacuated for about an hour Tuesday after someone made several phone calls to the city attorney’s office claiming a bomb would explode in the building.

Police responded to City Hall around 12:15 p.m., cleared the building as a precaution and allowed people back in as of 1:13 p.m. when nothing suspicious was found.

Police have the number linked to the calls and an investigation is ongoing, said mayoral spokeswoman Eileen Park.

Kristin Dennis, the mayor’s chief of staff, said the city has been receiving thousands of angry emails and phone calls a day since the mayor was criticized for his handling of a protest last weekend.

Portland Mayor Ted Wheeler said in a statement that it’s not clear if Tuesday’s threat is related and that he’s grateful no one was harmed.

“These threats of violence are alarming and create a sense of fear that no one should experience, but unfortunately, this is increasingly becoming a reality in local government,” he said.

Wheeler and the city’s police force have come under criticism after an attack on a conservative writer and others during downtown Portland demonstrations on Saturday.

The city core filled with hundreds of protesters of all stripes as Proud Boys followers, a #HimToo movement organizer and black-clad supporters of Rose City Antifa, many hiding their faces with dark motorcycle helmets or bandanas, converged.

-- Everton Bailey Jr.

-- Gordon R. Friedman