U2 singer Bono performed Sunday at a Kyiv underground subway station being used as a bomb shelter in a show of support for Ukrainians enduring the Russian invasion.

Accompanied by guitarist the Edge, Bono sang the Ben E. King song “Stand by Me” at the Khreschatyk station. Another musician dressed in a Ukrainian military uniform — identified by various media outlets as Taras Topolia of the band Antytila — sang with Bono.

“The people in Ukraine are not just fighting for your own freedom, you are fighting for all of us who love freedom,” Bono told the audience, according to Rolling Stone. “We pray that you will enjoy some of that peace soon.”