Performers from around the world have begun reacting to news of a deadly explosion at Ariana Grande's concert at Manchester Arena in the UK.

Grande had finished her performance, part of her Dangerous Woman tour, and patrons had begun leaving when the explosions occurred leaving as many as 19 people dead and 50 injured.

The tour began in Phoenix in the United States in February this year before moving to Europe in early May. 

Her Manchester performance was the 43rd of a 71-date tour which is due to arrive in Australia in September.

Grande is yet to speak of the incident herself, but representatives for the 23-year-old have confirmed she was not injured in the incident.

One of her support acts, American rapper Bianca Landrau, posted on Twitter confirming she was safe.

As news of the incident began breaking around the world, other performers expressed their shock and grief and their concern for Grande and her fans at the show.

Nicki Minaj, who appeared on Grande's 2016 hit Side to Side, was among the first musicians to post on Twitter.