The attacker killed the deputy dean, a faculty secretary and two lecturers at the Osmangazi University in the western Turkish city of Eskisehir.
Four people were killed in a shooting at a university in the northwest Turkish city of Eski-ehir on Thursday, the state-run news agency Anadolu reported.
Other reports said the attacker had upset colleagues by alleging they were members of the group blamed for the failed 2016 coup in Turkey.
Activist Sophia de Bruyn speaks of her last moments with Winnie
Her reputation was sullied by scandals in her later years, including a 1991 conviction for kidnapping and assault. She will be honoured by a state funeral on April 14, preceded by an official memorial service on April 11.
Gonen said he believed the assailant was looking for the dean, who was not in the building at the time when he entered the education faculty and opened fire. A reporter for Anadolu, speaking on CNN Turk, said he had surrendered rather than trying to escape.
"He was a frightening person", Yucel told the newspaper.
President Recep Tayyip Erdogan later met YOK head Yekta Sarac, who briefed him about the attack. More than 250 people were killed in the coup bid. Gonen said the dean was not in his office at the time of the shooting.
Woman playing with guns shoots man while on Facebook Live
Police identified the woman as Cassandra Damper, 25, who told police that she believed the weapons were not loaded. A moment later, the gun goes off and Holmes could be seen slumped over in the passenger's seat.
University staff say he has been detained by security forces. "Who will pay the price for protecting him now?"
Eskisehir Governor Ozdemir Cakacak said regional prosecutors had launched an investigation into the incident.
What to know about growing US-China trade tensions
The US exports 62 percent of its soybeans and 25 percent of Boeing aircraft to China , according to the Chinese Foreign Ministry. Still, U.S. stock futures slumped over concerns that the back-and-forth tariff actions will stunt trade and growth.