EXPOSITION PARK >> A male professor was stabbed and killed on the USC campus Friday and a suspect, identified as a male student at the university, was taken into custody a short time later, police said.

The suspect was approximately 25 years old, according to Margaret Stewart of the Los Angeles Fire Department. The victim was pronounced dead at the scene, she added. The suspect was not immediately identified. No other injuries were reported.

“The victim was a professor at the university,” said Officer Drake Madison of the Los Angeles Police Department, adding that the suspect was a USC student.

• RELATED PHOTOS: USC students talk about fatal stabbing of Bosco Tjan

Los Angeles Police Officer Meghan Aguilar said the professor was killed inside the Seeley G. Mudd building in the heart of campus. She said a male student was arrested without incident immediately after police arrived at the scene of the attack but his name was not released. Aguilar could not say who called police but said it wasn’t the professor or the student.

Aguilar said the student was set to be interviewed Friday night and that his name would be released after he was booked.

USC President C. L. Max Nikias identified the professor killed as Bosco Tjan in a letter addressed to the USC community.

Tjan joined USC in 2001, taught in the Dornsife College of Letters, Arts and Sciences, and served as co-director of the Dornsife Cognitive Neuroimaging Center, Nikias said.

“As the Trojan family mourns Professor Tjan’s untimely passing, we will keep his family in our thoughts,” Nikias said.

The USC Department of Public Safety said in a statement that investigators believe the attack was not random and “was the result of a personal dispute.”

• RELATED STORY: Student who allegedly killed USC professor identified by police

Chris Purington, project manager at Tjan’s lab, said he never heard of anyone having a problem with Tjan — a married father of one listed in public records as 50 years old — and had no idea who would have wanted him dead.

“He was somebody who really cared about people. I know he cared about me,” Purington said through tears. “He mentored people and he looked out for them. He spent a lot of time thinking about what it means to be a mentor and guide people.”

He said the professor gave him a job both after he graduated from USC and after graduate school at the University of California-Berkeley.

Purington traveled with Tjan for various science conferences and said that everyone knew and loved the professor.

“People talk about scientists as very cold or robotic. Bosco is a guy that he could talk to anybody about anything,” he said. “He couldn’t move through a room without being sidetracked in all these conversations.

“He just had this energy about him. Kinetic might be the word,” Purington said. “He had a huge impact on my life.”

Just after 4:30 p.m. Friday, paramedics with the Los Angeles Fire Department responded to a reported stabbing in the 3600 block of McClintock Avenue, located on campus near the Seeley G. Mudd building.

The building is in the center of campus near the school’s running track.

The university’s Trojans Alert emergency texting service sent out a message urging students, faculty and employees to stay away from the building, which houses science and medical classrooms.

“Police-related incident in progress at Seeley G. Mudd. No danger to USC or the community. Stay away from the area,” the message read.

In a separate incident Friday, a male suspect — who was reported to have been acting aggressively — sprayed a woman with a fire extinguisher inside the Doheny Library at USC. The library was evacuated, but the incident was unrelated to the fatal stabbing, according to the Daily Trojan’s Twitter feed.

In recent years, USC has continued to make headlines with a series of high-profile crimes.

In 2014, a graduate student died after being attacked by several people as he walked back to his off-campus apartment after attending a late-night study session.

Xinran Ji, a 24-year old engineering student, managed to return to the apartment, where his roommate found him dead.

In 2012 Chinese graduate students Ming Qu and Ying Wu were shot and killed as they sat in their BMW about a mile from campus.

Shortly after the crime, then-Mayor Antonio Villaraigosa held a news conference with university officials, and members of the LAPD to try and reassure students, family members and the international community that the campus was safe.

USC has 44,000 students enrolled, including more than 10,000 international students.

Correction: A previous version of this story incorrectly stated when Xinran Ji was killed. The crime that took his life occurred in 2014.