Taylor Swift, Demi Lovato react to Ariana Grande concert bombing

May 23 (UPI) -- A number of pop stars including Taylor Swift, Demi Lovato, Katy Perry and Lorde have shared their reactions concerning Monday's Ariana Grande concert bombing.

A suicide bomber killed 22 people and injured 59 others at Manchester Arena following Grande's concert in what British police are treating as a terrorist incident.

Grande, who was unharmed during the incident, tweeted that she was "broken" and added, "From the bottom of my heart, I am so so sorry. I don't have words." The singer was on tour to promote her 2016 album Dangerous Woman. She was scheduled to perform on Thursday at the O2 Arena in London, but the tour has been suspended.

"We mourn the lives of children and loved ones taken by this cowardly act," Scooter Braun, Grande's manager, said in a statement. "We ask all of you to hold the victims, their families, and all those affected in your hearts and prayers."

"My thoughts, prayers and tears for all those affected by the Manchester tragedy tonight. I'm sending all my love," Swift wrote on Twitter about the tragedy.

Lovato tweeted, "Tearing up imagining innocent concert goers losing their lives.. praying for everyone and all #arianators."

"Praying for everyone at @ArianaGrande's show," Perry posted.

Lorde wrote, "Every musician feels sick & responsible tonight—shows should be safe for you. truly a worst nightmare. sending love to manchester & ari."