UNLV shooting: At least 3 fatalities: Source

A suspect is dead following a fatal shooting at the University of Nevada, Las Vegas, on Wednesday, according to authorities and sources.

At least three people were killed in the incident, an official briefed on the investigation told ABC News. Sheriff Kevin McMahill had earlier said there were three victims in unknown conditions, adding, “That number could change.”

UNLV said shots were reported at Beam Hall, home to the business school, as well as the student union, which is next door.

The shooting was reported at 11:45 a.m. and police responded and “engaged” the suspect, authorities said.

A ground stop was initiated at Las Vegas’ Harry Reid International Airport on Wednesday due to the close proximity of the airport runways to UNLV, and because of the police response to the shooting, which included helicopters, according to an official briefed on the incident.

UNLV said police were working to evacuate buildings one at a time and students were urged to shelter in place.

Authorities said there is no further threat to the university, which has been closed for the rest of the day.

No motive is known, authorities said.

Las Vegas Mayor Carolyn Goodman tweeted out a statement stating “Praying for everyone on campus as law enforcement responds to the situation.”

Gov. Joe Lombardo said in a statement that he was in communication with the school and law enforcement as the investigation continued.

President Joe Biden was briefed on the shooting, according to a White House official.

This is a developing story. Please check back for updates.

ABC News’ Aaron Katersky and Molly Nagle contributed to this report.