What led to Mel B breaking her ribs and 'severing' her hand

Mel B’s recent injuries are the result of a fall down stairs. 

After saying that she was suffering from a severed hand and broken ribs Monday morning on Instagram, more details are coming to light about how the 43-year-old Spice Girls singer’s injuries occurred.

ET has learned that Mel was staying at a friend’s house in London, England, over the weekend and, when she woke up and decided to go downstairs, she fell down a narrow staircase. Her friend took her to the hospital where doctors determined she needed surgery, which she has already undergone.

Mel was scheduled to fly back to Los Angeles, California, on Sunday, but is still recovering in London. She was supposed to be in L.A. on Monday to take her court-ordered drug and alcohol test.

Though she won’t be in L.A. for the Monday test, ET has learned that, when she arrived at the hospital in London, doctors performed a drug and alcohol test, of which all of the results came back negative. Her rep says the drug and alcohol test at the hospital was mandatory per the doctors, not a part of her court-ordered test that she was supposed to take on Monday.

Her rep previously told ET that the singer has tested negative on her last 14 drug and alcohol tests. Her rep insists to ET that neither drugs nor alcohol played a role in Mel’s fall.

As a result of the tumble, Mel canceled a New York signing of her book, Brutally Honest, which she said would be rescheduled. Additionally, on Monday’s Today, Kathie Lee Gifford and Hoda Kotb revealed that Mel’s scheduled co-hosting gig of the morning show’s fourth hour on Tuesday's episode was canceled before wishing her the best.

Mel revealed her injuries in an Instagram post Monday morning, where she thanked the hospital staff and her fans for their support.

“For now my right arm/hand is all stitched up and I’m trying to keep still to heal my broken ribs, ohhh the pain,” she wrote in part. “But I’m in super safe hands with the care of everyone here at the hospital!!!!! Thank you all for understanding, I love you all.”

In a second Instagram post, the singer showed off her hospital visitors -- the Spice Girls themselves! In the gif, Mel is lying in the hospital bed, while Melanie C, Geri Halliwell and Emma Bunton surround her and make cute faces for the camera.

"When your besties show up to the hospital with hugs and laughter and A LOT of love, ahhhh I love my spice girls yipppeee #friendship #family #spicegirls," Mel captioned the sweet post.  

The injuries come in the midst of a busy time for the singer, who recently released her memoir, Brutally Honest, and is set to tour with the Spice Girls next year. 

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Mel B out and about
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Mel B out and about
AMERICA'S GOT TALENT -- 'Live Quarter Finals Results 2' Episode 1314 -- Pictured: Mel B -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
HOLLYWOOD, CA - AUGUST 22: (L-R) Heidi Klum, Howie Mandel, Simon Cowell and Mel B attend a ceremony honoring Cowell with a star on the Hollywood Walk of Fame on August 22, 2018 in Hollywood, California. (Photo by Rich Fury/Getty Images)
HOLLYWOOD, CA - AUGUST 21: Mel B attends 'America's Got Talent' Season 13 Live Show Red Carpet at Dolby Theatre on August 21, 2018 in Hollywood, California. (Photo by Jon Kopaloff/FilmMagic)
HOLLYWOOD, CA - AUGUST 14: Mel B attends 'America's Got Talent' Season 13 Live Show Red Carpet at Dolby Theatre on August 14, 2018 in Hollywood, California. (Photo by Jon Kopaloff/FilmMagic)
TODAY -- Pictured: Hoda Kotb and Mel B on Wednesday, June 27, 2018 -- (Photo by: Nathan Congleton/NBC/NBCU Photo Bank via Getty Images)
UNIVERSAL CITY, CA - MAY 02: TV host Mel B attends NBCUniversal's Summer Press Day 2018 at The Universal Studios Backlot on May 2, 2018 in Universal City, California. (Photo by Alberto E. Rodriguez/Getty Images)
AMERICA'S GOT TALENT -- 'Judge's Cuts 1' Episode 1307 -- Pictured: (l-r) Howie Mandel, Mel B, Ken Jeong, Tyra Banks, Heidi Klum -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
INGLEWOOD, CA - MARCH 24: Mel B arrives at the Nickelodeon's 2018 Kids' Choice Awards at The Forum on March 24, 2018 in Inglewood, California. (Photo by Steve Granitz/WireImage)
INGLEWOOD, CA - MARCH 24: Heidi Klum (L) and Mel B attend Nickelodeon's 2018 Kids' Choice Awards at The Forum on March 24, 2018 in Inglewood, California. (Photo by Charley Gallay/KCA2018/Getty Images for Nickelodeon)
AMERICA'S GOT TALENT -- 'Auditions' -- Pictured: Mel B -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
AMERICA'S GOT TALENT -- 'Auditions' -- Pictured: (l-r) Howie Mandel, Mel B, Heidi Klum, Simon Cowell -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
HOLLYWOOD, CA - SEPTEMBER 20: Ventriloquist-singer Darci Lynne Farmer (L) and Singer-songwriter-TV personality Mel B attend NBC's 'America's Got Talent' Season 12 Finale at the Dolby Theatre on September 20, 2017 in Hollywood, California. (Photo by Jeffrey Mayer/WireImage)
AMERICA'S GOT TALENT -- 'Live Finale Results' Episode 1224 -- Pictured: (l-r) Howie Mandell, Mel B, Simon Cowell, Heidi Klum -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
HOLLYWOOD, CA - SEPTEMBER 19: Mel B arrives at the NBC's 'America's Got Talent' Season 12 Finale Week at Dolby Theatre on September 19, 2017 in Hollywood, California. (Photo by Steve Granitz/WireImage)
AMERICA'S GOT TALENT -- 'Live Results 4' -- Pictured: Mel B -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
HOLLYWOOD, CA - AUGUST 15: Mel B, Melanie Brown arrives at the Premiere Of NBC's 'America's Got Talent' Season 12 at Dolby Theatre on August 15, 2017 in Hollywood, California. (Photo by Steve Granitz/WireImage)
HOLLYWOOD, CA - AUGUST 15: Mel B, Melanie Brown arrives at the Premiere Of NBC's 'America's Got Talent' Season 12 at Dolby Theatre on August 15, 2017 in Hollywood, California. (Photo by Steve Granitz/WireImage)
AMERICA'S GOT TALENT -- 'Live Show 1' -- Pictured: Mel B -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
AMERICA'S GOT TALENT -- 'Judge Cuts' Episode 1210 -- Pictured: Mel B -- (Photo by: Vivian Zink/NBC/NBCU Photo Bank via Getty Images)
LOS ANGELES, CA - MAY 06: Singer Mel B and family attend City Year Los Angeles Spring Break on May 6, 2017 in Los Angeles, California. (Photo by Alberto E. Rodriguez/Getty Images for City Year Los Angeles)
AMERICA'S GOT TALENT -- 'Judge Cuts' Episode 1211 -- Pictured: Mel B -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
UNIVERSAL CITY, CA - APRIL 27: Singer Mel B arrives at NBC's 'America's Got Talent' Judge Cut Rounds at the NBC Universal Lot on April 27, 2017 in Universal City, California. (Photo by Amanda Edwards/WireImage)
PASADENA, CA - MARCH 27: Mel B attends NBC's 'America's Got Talent' season 12 kickoff at Pasadena Civic Auditorium on March 27, 2017 in Pasadena, California. (Photo by Jason LaVeris/FilmMagic)
UNIVERSAL CITY, CA - APRIL 27: Singer Mel B arrives at NBC's 'America's Got Talent' Judge Cut Rounds at the NBC Universal Lot on April 27, 2017 in Universal City, California. (Photo by Amanda Edwards/WireImage)
AMERICA'S GOT TALENT -- Auditions Pasadena Civic Auditorium -- Pictured: Mel B -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
PASADENA, CA - MARCH 27: Mel B attends NBC's 'America's Got Talent' season 12 kickoff at Pasadena Civic Auditorium on March 27, 2017 in Pasadena, California. (Photo by Jason LaVeris/FilmMagic)
NEW YORK, NY - JANUARY 18: Singer/Model Mel B is seen walking in Soho on January 18, 2017 in New York City. (Photo by Raymond Hall/GC Images)
NEW YORK - JANUARY 17: The Late Show with Stephen Colbert and guest Mel B during Tuesday's 01/17/16 show in New York. (Photo by Scott Kowalchyk/CBS via Getty Images)
NEW YORK, NY - JANUARY 18: Singer/Model Mel B is seen walking in Soho on January 18, 2017 in New York City. (Photo by Raymond Hall/GC Images)
NEW YORK, NY - JANUARY 17: Singer and television personality Mel B enters the 'The Late Show With Stephen Colbert' taping at Ed Sullivan Theater on January 17, 2017 in New York City. (Photo by Ray Tamarra/GC Images)
NEW YORK, NY - JANUARY 17: Singer and television personality Mel B enters the 'The Late Show With Stephen Colbert' taping at Ed Sullivan Theater on January 17, 2017 in New York City. (Photo by Ray Tamarra/GC Images)
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