Late on Thursday, a Russian Sukhoi-34 supersonic warplane inadvertently discharged a missile into the city of Belgorod near Ukraine, triggering an explosion and wounding three people.

Video from the scene revealed concrete mounds on the street, multiple damaged automobiles, and a structure with smashed windows. In one view, an automobile looked to be upside down on the roof of a business.

Vyacheslav Gladkov, governor of the Belgorod area, declared a state of emergency overnight, citing a crater 20 meters (65 feet) broad on one of the main streets. He went on to say that four automobiles and four residential structures were destroyed.

Three people had been injured, he said.

“Thank God there are no dead,” Vyacheslav Gladkov said in a statement on Telegram, adding that an apartment building had been evacuated overnight.

Tass cited the Russian defense ministry as saying that a Su-34 supersonic fighter-bomber jet had accidentally discharged a munition.

“As a Sukhoi Su-34 air force plane was flying over the city of Belgorod there was an accidental discharge of aviation ammunition,” Tass cited the defense ministry as saying.

It did not say what kind of weapon was involved.

The ministry said some buildings had been damaged and announced a probe was already under way, according to Tass.

The Belgorod region is one of several parts of southern Russia where targets such as fuel and ammunition stores have been rocked by explosions since the start of what Moscow calls its “special military operation” in Ukraine on Feb. 24, 2022.