Khloe and Kourtney Kardashian Snapped Leaving New York With Kris Jenner After Kanye West's Hospitalization

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The Kardashians have left the Big Apple.

and Kourtney Kardashian, along with mom Kris Jenner, were snapped boarding a private plane from Teterboro Airport in New Jersey on Tuesday after attending the Angel Ball in New York City on Monday night. Meanwhile, on the West Coast, Kim Kardashian West's husband, Kanye West, made headlines of his own when he was hospitalized in Los Angeles.


WATCH: Khloe and Kourtney Step Out in Racy Sheer Dresses for the Angel Ball 

As ET previously reported, Kim was scheduled to make her first public appearance since being robbed at gunpoint in Paris at the Angel Ball, but canceled in order to be by her husband's side. 

"Kim was terrified," a source told ET. "She was so scared when she heard the news and rushed to be by his side. There was no question about her staying in NYC. She had to be with him."

According to the source, Kim was only in NYC for a few hours before flying back to Los Angeles, where she then headed straight to the hospital to see Kanye. The source also confirmed reports that Kanye was at the home of his trainer and close friend, Harley Pasternak, on Monday afternoon, when he was convinced to go to the hospital for "his own well-being and safety." The source claims Kanye had a "mental breakdown," in large part due to his busy work schedule.

"Kim was so excited to go to the Angel Ball," the source added about the black-tie event honoring her late father, Robert Kardashian Sr., and his humanitarian and philanthropic contributions to cancer research. "She got herself ready for [Monday] night to be her first public appearance. It's a cause that is so important to her and she wanted to be there for her family."

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

Kim's mother and sisters carried on in her absence, with Kris taking the stage to accept an award on her late ex-husband's behalf.

"One of the things he used to teach me and passed down to our children was about philanthropy and about giving and about doing it diligently, constantly, joyfully and generously," Kris shared of Robert Sr., who died of esophageal cancer in 2003. "He taught me and them that no matter what you do in life -- and he would have been very proud of us -- and what you make, you give back and you do it without saying a word."

Kris went on to explain that the Kardashian family is often criticized for not giving back or not using their fame for good, but that they are very generous "often silently," and "for things that don’t need a loud voice."

"After hearing so many stories tonight and so many wonderful outcomes, I'm really glad that we can be a voice," Kris concluded. "Tonight what we do may be very small, but we intend on doing it year after year."

On Tuesday morning, before boarding their private plane, Kris, Khloe and Kourtney made time for some business, attending a meeting with designer Tommy Hilfiger in his New York office.

As it turns out, West's presence was not entirely absent from the Angel Ball. The rapper's heartfelt song, "Only One," played over a montage of Kardashian home video footage. For more from inside the event, watch below.

WATCH: Robert Kardashian Sr. Tribute Event Included Reality Cameras and a Kanye West Song -- But No Kim