A Washington state man was arrested Tuesday for allegedly making threats against President Obama, according to the Secret Service.

Secret Service spokesperson Brian Leary told POLITICO that a Federal Way, Wash., man was arrested on suspicion of sending a threatening email to the FBI. The operation was conducted jointly between the Federal Way police and the Secret Service.

When confronted by law enforcement agents, the suspect, Anton Caluori, 31, opened the door holding a shotgun, according to Leary. He was taken into custody with no injuries.

Caluori’s apartment is now being swept for bombs, after he reportedly made reference to explosive materials.

According to Emily Langlie, a spokeswoman for the local U.S. attorney’s office, Caluori will appear in federal court in Seattle at 2:30 p.m.

According to the Secret Service, he stands charged with making threats against the president and assault on a federal official.

– Politico