Update 2: CBS News reports that professor William Klug was killed by a student upset about his grades. The name of the shooter, who also killed himself, has not been released.

BREAKING. Sources tell @CBSNews [1] the 2 people shot in the UCLA murder-suicide were a student and a professor, William Scott Klug. (1/2)

— Charlie Kaye (@CharlieKayeCBS) June 1, 2016 [2]

Update: LAPD Chief Charlie Beck confirmed that two people died at UCLA in a murder-suicide shooting that happened just after 10 a.m. The campus is no longer on lockdown and all classes have been canceled for the day. "The campus is now safe," Beck said. The motive and relationship between the dead are still unclear.

2 people died in a murder-suicide shooting at UCLA. This is last week of classes before finals.

Here's what we knowhttps://t.co/5pzhYKa6Ql [3]

— Los Angeles Times (@latimes) June 1, 2016 [4]

Original story: UCLA is on lockdown after reports of a shooting at the engineering building. Two people have been confirmed dead by police. The school newspaper, the Daily Bruin, and local news stations have been tweeting updates.

Bruin Alert: shooting at Engineering 4. Get somewhere safe and secure. Deny entry. Campus is on lockdown.

— UCLA Housing (@UCLAhousing) June 1, 2016 [5]

Two dead after shooting at #UCLA [6], campus spokesman has confirmed.

— Daily Bruin (@dailybruin) June 1, 2016 [7]

Shooter is wearing a black jacket and black pants, according to police. #UCLA [8]

— Daily Bruin (@dailybruin) June 1, 2016 [9]

UPDATE: LAPD on tactical alert at #UCLA [10] following reports of an active shooter. 2 stretchers went into building pic.twitter.com/Qzz0dEnJiV [11]

— Val Gratias (@valeriegratias) June 1, 2016 [12]

WATCH: Student describes UCLA lockdown: 'Teacher .. made them flip all the tables, put them up against the door' pic.twitter.com/UxcbyRPVsV [13]

— CBS Los Angeles (@CBSLA) June 1, 2016 [14]

We will update this post as we get more information.