The gunman who opened fire on a Virginia University has been identified as a National Guardsman turned Isis terrorist.
Mohamed Bailor Jalloh, 36, had entered a classroom and asked if it was an Reserve Officers' Training Corps class.
After someone confirmed that it was, he opened fire, shooting the professor several times, law enforcement sources told the New York Post.
According to Old Dominion Chief of Police Garrett Shelton, two victims were transported to a hospital, where one died, while a third person believed to also be a victim took themselves to another hospital.
In a posting on its website, the university said there was no longer a threat but urged the public to avoid the scene of the shooting where emergency personnel continued to work.
Classes and campus operations were cancelled for the rest of the day.
The university's initial alert said that the gunman opened fire shortly before 10.49am local time in a classroom in Constant Hall,.
By midday, police vehicles with flashing lights had blocked off streets around the Norfolk campus. The university, founded in 1930, serves some 24,000 students, according to the school's website.
University President Brian Hemphill said in a statement to the school community that Old Dominion had "faced a tragedy" and thanked police and emergency responders for swift intervention.
Virginia Governor Abigail Spanberger wrote on Facebook that she had spoken with university leadership and was mobilizing state support to assist with the situation.
In 2017, Jalloh was sentenced to 11 years in prison plus five years supervised release for attempting to provide material support to ISIS and the ISIL, according to the US Department of Justice.