A California man is charged with threatening to shoot up Massachusetts companies over five extremely explicit phone calls.

“Hey, you (expletive)ing (expletive)holes are dead…you hear me. You (expletive)ing cheated me, you screwed me out of money over here. I’ve got an AK-… I have an AK-47, you know, with a drum magazine and I’ve got a Glock with two silencers. I’m going to walk into [Company 1]… watch me, watch, I’m going to walk into [Company 1], I’m going to shoot up the whole (expletive) place with an AK-47,” Daniel Nguyen, allegedly said in a voicemail placed to the Somerville business a little before 3 a.m. Eastern Time on Jan. 12.

“You’re all going to be (expletive) dead. It’s going to be a (expletive) bloodbath. You hear me? I’ve got a (expletive) AK-47. I’m gonna shoot up the whole [Company 1] office,” his voicemail continued, according to a law enforcement affidavit supporting the charges.

Nguyen, 34, was arrested on a single federal count of transmitting a threat in interstate commerce on Thursday in California. Court documents do not list an address, but he likely lives in or near the Bay area as he made an initial appearance the next day in federal court in San Francisco. He’ll be arraigned before U.S. District Court Magistrate Judge David H. Hennessy in the federal court in Boston at an as-yet undetermined date.

The calls continued the next day to the same company and consisted of very similar threats, according to FBI Special Agent Casey Biagiotti’s affidavit.

“I spoke to the employee from Company 1 who reported the threats,” Biagiotti wrote in the affidavit. “The employee expressed fear and concern for their life, as well as the lives of the other Company 1 employees. As a result of these voicemails, the building was evacuated and security was increased on company grounds.”

While this unidentified company received four of the five calls, a second company was also called that first day, about five minutes before the other company.

“I (expletive) hate your company. I’m an investor and you (expletive) screwed me out of money. I have an AK-47 and I have a Glock. I’m gonna go in there and I’m going to shoot up the whole fucking office,” Nguyen allegedly said in the voicemail. “You’re all going to be (expletive) dead. You’re gonna wish you didn’t (expletive) me out of money.”

Both companies use Microsoft Teams as their phone service, so the FBI requested records for the calls from Microsoft, which is how they landed on Nguyen as their suspect.

Nguyen was arrested in 2018 by the San Francisco Police Department, according to the FBI affidavit, for threatening a business in that city, also by phone call. These threats took on a very racist tone in which he threatened both Filipinos and Mexicans — who he identified by a derogatory word.

A search warrant also uncovered alleged emails he made to a school employee in Nevada that featured many instances of a racist word for black people.

“…I hate (expletive) and the only good (expletive) is a dead (expletive) that is shot and killed. Police officers need to shoot and kill all (expletive) for our safety,” he allegedly wrote in one of the emails.