“It appears it is entirely contained,” LAPD Police Chief Charlie Beck said in a Wednesday afternoon press conference. “We believe there are no suspects outstanding and no continuing threat to the UCLA campus.”

The campus was placed on lockdown just before 10 a.m. after reports of a possible shooter in an engineering building, Boelter Hall. The LAPD was on a citywide tactical alert following the shooting.

Beck said the shooting occurred in a small office. Both men were found dead at the scene.

Although police and school officials did not release the identities of the men, both KABC and NBC Los Angeles identified one of the dead as William Klug, an engineering professor.

A gun was recovered at the scene as was a piece of evidence that “could be” a suicide note, Beck said.

The LAPD was in the process of releasing students from lockdown.

“The campus is now safe,” Beck said. “The issue that has occurred has been contained.”

Students reported hearing a loud noise and the sound of gun casings falling to the ground, UCPD Lt. Richard Davis said, according to The Daily Bruin.

A law enforcement official told Fox News that assets from the FBI’s Los Angeles field office responded to the shooting scene along with local partners, including LAPD. A separate law enforcement official said assets from ATF’s LA division were on scene.

“We just went to official lockdown in the dark!” a school employee told FoxNews.com in a text message. “All students moved to the back.”

“We are in lockdown…but they seemed to be only focusing over on Boelter Hall because I literally just walked through campus to my building and went straight through to my office. Had no idea of what was going on till I got here!”

A tweet from the UCLA Bruin Alert account warned students to remain on lockdown.

“Go to secure location and deny entry (lockdown) now!” a tweet said.

Officials placed Fairburn Elementary School, Warner Elementary School and Emerson Community Charter Middle School on lockdown as a precaution due to police activity in the area, according to the Los Angeles School Police Department.

The last day of classes at UCLA was scheduled for June 3. Graduation is set to take place on June 10 and June 11.

FoxNews.com’s Malia Zimmerman, Fox News’ Matthew Dean and The Associated Press contributed to this report.