An impatient man was arrested Monday morning after he allegedly walked into a state senator’s office in Harlem and threatened to “blow this place up,” police and law enforcement sources said.

The suspect, identified as Vadim Dergachev, allegedly made a series of disturbing threats against Sen. Cordell Cleare’s staff around 10:15 a.m. inside the Adam Clayton Powell State Office Building, according to authorities.

“I’m going to blow this place up,” Dergachev allegedly said, sources told The Post.

Police were called and Dergachev, 42, was charged with terroristic threats, threatening to cause mass harm, third-degree menacing and second-degree harassment, the NYPD said.

The Post has sought comment from Cleare’s office.

The Harlem pol, who is serving his second term representing the 30th state senate district, said City and State she was not in her district office when the threats were made.

But he happened to be on the phone with an employee who was in the office when the suspect was there, asking to see the Democratic lawmaker.

“She said this man came in and immediately demanded, just said, ‘I’m asking, I want to see (Cleare), and if I don’t get to see her, I’m going to shoot up this office, I’m going to bomb the place, and remarks like that,” Cleare recalled.

The suspect also referred to President-elect Donald Trump’s victory and how “things are going to change now,” she told the publication.

“He made some disparaging remarks about President Biden and Vice President Harris,” Cleare said.

The state legislature’s Black, Puerto Rican, Hispanic and Asian Caucus condemned the political threat against Cleare in a statement late Monday.

“Regardless of political affiliation or preferred candidates, there is absolutely no place for threats or violence in our public discourse,” the caucus said.

“It is the duty of every leader, holding federal or local office, to set a positive example for all constituents by promoting respectful dialogue and promoting a culture of nonviolence.”