Ariana Grande said she is "broken" after a terror attack at her Manchester concert left 22 people dead and many injured.
The 23-year-old American singer was performing at the Manchester Arena on Monday night as part of her Dangerous Woman tour when a suicide bomber detonated an improvised explosive device.
Making her first comment since the attack, Grande said on Twitter she is "broken".
"From the bottom of my heart, I am so so sorry. I don't have words," she wrote.
Representatives for Grande have said she is physically "okay" following the blast, but TMZ has reported the singer will be suspending the remainder of her tour.
It has quoted sources close to the singer, saying Grande is "inconsolable".
"Highly unlikely her gigs on Thursday and Friday at the 02 will go ahead," Grande's representatives told Sky News.
After the O2 gigs on Thursday and Friday, she is meant to perform in Belgium, Poland and Germany in the coming weeks.
Her manager Scooter Braun tweeted "words cannot express our sorrow for the victims and families harmed in this senseless attack".
"We mourn the lives of children and loved ones taken by this cowardly act," he wrote.
"We are thankful for the selfless service tonight of Manchester's first responders who rushed towards danger to help save lives.
"We ask all of you to hold the victims, their families, and all those affected in your hearts and prayers."
Grande began her career in the Broadway musical 1" and on the Nickelodeon TV series Victorious.
She then went on to release her solo debut album and is best known for her singles Problem, and Break Free.
(c) Sky News 2017