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wsfurlan/iStock(CHARLOTTE, N.C.) — Two people have been killed and another four injured after a shooting on the campus of the University of North Carolina at Charlotte, officials told ABC News.

Three of the injured victims are in critical condition, police said at a news conference Tuesday night. The fourth person suffered non life-threatening injuries.

One person is now in custody, according to Charlotte-Mecklenburg police. There is no reason to believe anyone else is involved, officials said.

The suspected shooter is a UNCC male student, ABC affiliate WSOC-TV reported.

Police have not identified the suspect but said he was not someone already on their radar.

Police dispatch received calls around 4:40 p.m. reporting a suspect was armed with a pistol and had shot several students, police said.

Officers responded to the scene and were able to get into the building where the suspect was located, disarmed him and took him into custody, officials said. The suspect did not say anything to the officers as he was arrested.

“Our officers actions definitely saved lives. There’s no doubt about that,” said University of North Carolina at Charlotte Police & Public Safety Chief Jeff Baker.

The school was placed on lockdown as officers secured the campus. Students are now able to return to their residence halls on campus, police said.

The identities of the deceased victims has not been released. Police are waiting to notify family members.

UNC Charlotte police and Charlotte-Mecklenburg police have established a family reunification center at the Harris Teeter at 8600 University City Blvd.

In addition to the Charlotte Mecklenburg Police, the ATF and FBI are also assisting in the investigation.

All events tonight at the campus have been canceled, including a scheduled Waka Flocka Flame concert. The artist posted on Instagram that he would not be performing.

This is a breaking news story. Please check back for updates.