Updated

New Hampshire State Police fatally shot a gunman in the lobby of a psychiatric hospital on Friday afternoon, after the suspect allegedly shot and killed a security guard at the facility.

State Police initially responded to reports Friday of "multiple victims" in a shooting at New Hampshire Hospital in Concord.

The incident happened around 3:30 p.m. on Friday at New Hampshire Hospital in Concord, State Police Col. Mark Hall said at a news conference. The shooting was contained to the front lobby of the facility, which has roughly 185 beds and is the only state-run psychiatric hospital in the Granite State. 

Hall said CPR was performed on the victim, who later died at Concord Hospital.

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Police work at the scene of a shooting at New Hampshire Hospital late Friday afternoon.

Police work at the scene of a shooting at New Hampshire Hospital late Friday afternoon. (Geoff Forester/The Concord Monitor via AP)

Authorities identified the victim Friday night as 63-year-old Bradley Haas, a state Department of Safety security officer who was working at the front lobby entrance. Haas lived in Franklin, a small town about 20 miles from Concord. He worked as a police officer for 28 years and became a police chief, the state attorney general's office said in a statement.

Gov. Chris Sununu said in a social media post that the hospital campus was cleared, while police later said there was no threat to the public.

All patients at the psychiatric hospital were found safe and the state trooper who killed the gunman was not wounded, authorities said.

"Investigators with the New Hampshire State Police have searched and cleared a suspicious box truck near the scene. They determined the truck poses no safety risk," the statement from the attorney general's office said.

Several law enforcement agencies responded to the shooting. The Department of Safety provides security for the hospital.

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New Hampshire Hospital, in Concord, N.H., where a fatal shooting occurred Friday.

New Hampshire Hospital, in Concord, N.H., where a fatal shooting occurred Friday. (WMUR via AP)

The hospital remained in operation but was closed to visitors Friday evening, according to commissioner of the Department of Health and Human Services Lori Weaver.

"This is a difficult and unimaginable day for our employees and for our community," Weaver said. "We will continue to make resources available in the coming hours and days."

"Our dedicated staff will continue to provide skilled, compassionate care as they do every day," she added.

No further information was released about the shooter, a possible motive or other details of the attack.

The facility is located in the capital city of Concord, near Concord High School, multiple state agencies and a district courthouse. It is also located on a large campus sitting on over a hundred acres of land.

Democratic U.S. Rep. Annie Kuster, N.H., called the shooting "horrifying" in a statement and asked the public to avoid the area of the hospital while police investigated the incident.

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New Hampshire State Police car

New Hampshire State Police initially responded to reports Friday of "multiple victims" in a shooting at New Hampshire Hospital in Concord. (New Hampshire State Police)

"Thank you to the State Police Officers who responded to the scene so quickly," Kuster said in a statement. "My thoughts are with the victim, their family, and the Concord community."

Other members of the state’s congressional delegation also released statements of support.

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"The state immediately mobilized, and first responders and law enforcement are on the scene," Sununu said in a statement. "We will provide as many details as possible as this situation unfolds."

The shooting is the latest act of violence at a U.S. hospital. Medical centers nationwide continue to struggle to adapt to the growing threats, which have helped make health care one of the nation’s most violent fields.

The Associated Press contributed to this report.