A former student who opened fire at a Christian University in Oakland, California killing seven people and injuring three is being held by police.
Authorities identified the gunman as One Goh, 43. The school's founder Pastor Jong Kim said he was not sure whether the gunman, said to be a South Korean national, had left or been expelled.
Goh had been absent from Oikus University for months when he strode up to reception and shot the woman at the front desk on Monday. He is then said to have entered one of his previous classes.
Dawinder Kaur, who studied nursing alongside Goh, said the gunman entered the classroom on Monday and ordered students to line up against the wall.
Police recovered ballistics evidence from the campus to showing that Goh used a handgun, although it is unconfirmed whether the weapon has been seized by police.
In the chaos, Kaur was shot in the arm. Her brother told the newspaper: "She was running. She was crying; she was bleeding, it was wrong."
After hearing the initial shots, teachers told their students to run. Teacher Dechen Wangzom locked the door and turned off the lights, her husband told Associated Press.
Goh banged on the door several times before continuing the shooting rampage. Although no one was hurt, Goh shot out the glass window in the door.
Victims were carried onto ambulances, covered in blood, while one body was seen being loaded into a van. Five victims were pronounced dead at the university while two more died in hospital.
After a chaotic manhunt Goh was surrounded at a nearby shopping centre. A security guard at the Safeway is said to have approached Goh, telling him that he needed to talk to police as he had shot people.
His father told authorities that Goh had called him shortly after he opened fire.
The small university in Oakland California offers theology and nursing courses alongside Korean and English lessons. The Christian institution has only one building and teaches around 100 students. Its pupils often go on to pursue a career in medicine or in the church.