A man suspected of killing 2 people and injuring 4 others at UNC Charlotte sat with students for 10 minutes before opening fire

• Trystan Terrell, 22, has been charged with two counts of murder and four counts of attempted murder after a shooting at University of North Carolina at Charlotte, on Tuesday. 
• UNC Charlotte sophomore Tristan Field said the suspected gunman sat in a classroom with students for 10 minutes before opening fire. 
• UNC Charlotte Chancellor Philip Dubois said Ellis Parlier, 19, and Riley Howell, 21, were killed in the shooting.
• The four who were injured were identified as Drew Pescaro, 19, Sean Dehart, 20, Emily Houpt, 23, and Rami Alramadhan, 20.
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The man suspected of killing two people and injuring four others in a shooting at the University of North Carolina at Charlotte on Tuesday, sat in a classroom with students for 10 minutes before opening fire, a witness said.

Police charged 22-year-old Trystan Terrell with two counts of murder and four counts of attempted murder after the shooting in a campus classroom.

UNC Charlotte sophomore Tristan Field was in the room when gunfire began and told CBS News that the shooter sat in the classroom with other students before opening fire. 

Read more: 2 people killed, 4 injured in shooting at UNC Charlotte campus

"All of a sudden, without warning, no one yelled, no nothing. This gun started ringing out," Field told CBS News. "It was absolute panic. A chair fell in front of the door, so people were tripping over that, like, trying to climb over it. Some people fell down. It was like water through a funnel, but it wasn't fast enough."

Field previously tweeted that the shooter opened fire while students were giving final presentations.

UNC Charlotte Chancellor Philip Dubois identified the victims of the shooting to ABC News on Wednesday morning.

He said Ellis Parlier, 19, and Riley Howell, 21, were killed in the shooting. Drew Pescaro, 19, Sean Dehart, 20, Emily Houpt, 23, and Rami Alramadhan, 20, were injured. Three of the four injured were still in the hospital as of Wednesday, but all are expected to make a full recovery.

Officials have not revealed a motive for the shooting. 

"I can't tell you the sadness of the entire community to know that a situation like this has occurred on our campus," UNC Charlotte police Chief Jeff Baker told CNN. "We are all pretty much devastated."

The university cancelled final exams through the weekend.

The shooting happened just days after a gunman opened fire a synagogue in San Diego, California, killing a woman and wounding three others.

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• 1 dead, 3 injured after California synagogue shooting that local officials are calling a 'hate crime'
• Deadly synagogue shooting suspect in California linked to mosque arson
• Gunmen in attacks on New Zealand mosques and Poway synagogue were tied to racist manifestos on the same website. The founder says the online community would likely be responsible for future tragedies.

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