KRASNODAR, May 26. /TASS/. An explosion was heard in the southern Russian city of Krasnodar, but no injuries have been reported, the region’s crisis response center told reporters on Friday.

“At 4:17 a.m., Moscow time, an explosion was heard near a building on 54/2 Morskaya Street. First responders were sent to the area,” the center said in a statement. “According to preliminary information, no one was injured.”

“The building’s roof and windows were damaged, but no fire followed,” it said.

Krasnodar Mayor Yevgeny Naumov said “an office building and an apartment block” sustained damage.

“The cause of the incident is being established. I call upon residents to stay calm,” Naumov wrote on his Teleram channel.