Police have charged an 18-year-old college student for a shooting in a Virginia mall and campus site that left two women injured and caused students and shoppers to flee in a panic.
The two women were being treated in hospital and were reported to be in stable condition.
The shootings at a satellite campus of New River Community College, located inside a mall in Christiansburg, took place on Friday afternoon.
Suspect Neil Allan MacInnis has been charged with two counts each of malicious wounding and using a firearm in the commission of a felony.
Investigators have said they don not know what motivated the shootings. Authorities have not said what type of weapon was used or how it was obtained.
The college is inside a mall in southwestern Virginia A student who hid as the gunfire rang out said the shooter attempted to lure more students out of hiding by pretending he was a police officer.
Clara Keller said she was working in a computer lab at the satellite campus when she heard a gunshot.
As more sounded and a woman screamed, she and four friends huddled under a desk.
Ms Keller said the shooter called out, "Help, help!" as he walked, apparently feigning to be a victim, then yelled, "It's the police!"
"I knew it was just a matter of holding still as long as possible until the real police got there," she said.
Police arrested MacInnis minutes later, and he is being held at Montgomery County Jail.
In 2007, a gunman killed 32 people at Virginia Tech Police Chief Mark Sisson said authorities were investigating online postings reportedly made by MacInnis before the shooting, but that he was unable to confirm whether those postings were legitimate.
Mr Sisson also said MacInnis participated in the Christiansburg Police Department Citizens Academy program in 2012 - a course that gives civilians an idea of what happens at the department on a typical day.
Christiansburg is about seven miles (11km) outside Blacksburg, Virginia, the site of the 2007 Virginia Tech massacre.
That attack, in which a student killed 32 people and wounded 17 others, was the deadliest shooting incident by a single gunman in US history.
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