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 1993 and performed in the USA, Britain, Canada and many other countries, according to its website. He also toured Britain and performed at London’s Royal Albert Hall.

His last performance was just a day before he died, according to the Odesa opera house, which uploaded a video of Horay singing the Neapolitan song “O Sole Mio.”

“Today, we share this video with you. It is not just a performance. It is farewell. It is the last concert. It is the last gift from a singer who lived for the stage and left a piece of his soul there.”

The northeast Sumy region where the Opera house said Horay was killed, has been a fierce battleground in the Russia-Ukraine war. The Opera said he was there on a volunteer mission, but did not elaborate.

Russian forces have in recent weeks made incremental progress advancing towards the capital of the region, also called Sumy.

While capturing the region’s capital is likely beyond what Moscow is setting out to do, the move underlines the pressure Kyiv is under, from the northern border to the Black Sea.