Monday morning, the center of Kyiv was rocked by explosions as Russia launched a new air strike on the Ukrainian capital hours after launching scores of missiles and drones against targets across the country.

Reuters witnesses reported that panicked residents, some of whom initially disregarded the air raid siren while eating breakfast in cafes, raced for cover when the sky filled with smoke trails and blast clouds.

Vitali Klitschko, the mayor of Kyiv, reported pyrotechnics in the capital's central districts and emergency services' dispatch. He urged residents to shelter in place.

"Emergency services responded to a query near the capital's center. The assault against Kyiv continues. Residents rushed to shelters in metro stations as he wrote on the Telegram messaging app, "Don't leave the shelters!"

Yuriy Ihnat, a spokesman for the Ukrainian Air Force, stated that Iskander ballistic missiles and potentially S-300 and S-400 missiles were used in the attack.

He promised to provide additional details later.

There were no reports of significant damage immediately.

Klitschko posted a photograph of a large piece of burning metal in the midst of a busy street.

Footage from the Suspilne public broadcaster revealed that the underground metro was packed with people seeking shelter, many of whom were checking their phones.

The air raid siren blared throughout Kyiv and the surrounding region on Monday morning after Russia launched dozens of missiles and drones at targets across the country.

Many residents initially disregarded the air raid alarm until loud explosions in the city's heart shattered the peace.