05/23/2017 09:07 EDT | Updated 05/24/2017 10:20 EDT

Ariana Grande 'Broken' After Manchester Arena Attack

At least 19 people were killed and around 50 wounded in the attack.

U.S. pop star Ariana Grande late Monday said she felt at a loss for words after a suspected terror attack at her concert in the British city of Manchester.

"Broken," she wrote in her first reaction on Twitter.

"From the bottom of my heart, I am so so sorry. I don't have words," she wrote.

Police said at least 19 people were killed and around 50 wounded in the attack at the 21,000-capacity Manchester Arena.

Ariana Grande arrives at the 2016 American Music Awards at Microsoft Theater on November 20, 2016 in Los Angeles, California. (Photo by C Flanigan/Getty Images)

It was the deadliest attack in Britain since 2005.

Grande, a 23-year-old former child star, is not known for her political views and draws an audience of teenagers and pre-teenagers.

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