Stars are speaking out after Kanye West was hospitalized on Monday. The news came shortly after the rapper canceled the remaining U.S. dates on his Saint Pablo Tour.

LAPD officials confirmed to ET that they responded to a call in Los Angeles at around 1:20 p.m. “Upon our arrival the disturbance call became a medical emergency only where LAFD responded,” police continued. “Our job was done there and they took over the medical emergency."

WATCH: Kanye West Hospitalized After Cancelling U.S. Tour Dates, Bizarre Onstage Behavior

West’s mother-in-law, Kris Jenner, told ET at Monday night’s Angel Ball, “[I think he’s] just really tired, yeah, it’s a grueling tour.”

 EXCLUSIVE: Kris Jenner Shares Updates on Kim Kardashian and Kanye West: 'One Step at a Time'

Amid speculation as to the cause of his hospitalization, West has received lots of support from fellow celebrities on social media. Here are some of their tweets:

West’s wife, Kim Kardashian, was reportedly scheduled to attend the Angel Ball with her mom and sisters Khloe and Kourtney Kardashian, but supposedly canceled to be with her husband. The event honored her late father, Robert Kardashian, and would have been her first public appearance since her traumatic Paris robbery in October.

The recent cancellations follow a series of erratic behavior from West at several concerts. Last week he declared he would have voted for Donald Trump after seemingly supporting the president-elect's opponent Hillary Clinton with his wife last year, dissed longtime friends Beyonce and Jay Z, and ended his concerts early after ranting for long blocks of time.

WATCH: Kanye West Sings a Few Songs, Rants Against Beyonce and Jay Z, Then Leaves Angry Audience on Saint Pablo Tour

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