CNN —

Acclaimed Ukrainian opera singer Vladislav Horay has been killed while on a volunteer mission to the Sumy region, where a frontline battle for territory continues.

Horay was a soloist with the Odesa National Opera, which said in a statement that he was a “world-class tenor” and “Honored Artist of Ukraine,” whose voice was known around the globe.

“Tragic news has shaken the entire artistic community of Ukraine,” the opera house said in a post on Facebook on Sunday. “(Horay) was not only a talented performer — he was an example of strength, dignity, and kindness in life.”

The post did not say how Horay died.

According to a June 5 post on Horay’s Facebook, he was raising money for a Ukrainian naval unit.

Horay joined the Odesa National Academic Theater of Opera and Ballet in 1

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