Moscow Mayor Sergei Sobyanin claimed drone strikes hit two non-residential buildings in the Russian capital on Monday.

The Mayor wrote on Telegram: "Today, at about 4:00 am, drone strikes on two non-residential buildings were recorded."

"There were no serious damages or casualties," he said.

"All emergency services are on site," he wrote.

According to an emergencies official, a drone was downed at 17, Komsomolsky Prospekt in central Moscow, and another drone hit an office building on Prospekt Likhacheva in southern Moscow. The thwarting of a drone attack was confirmed by the Russian Defense Ministry, reports TASS.

 The debris of a drone was found in central Moscow on Monday, an emergencies official told TASS.

"At 17, Komsomolsky Prospekt, the debris of a drone was discovered. According to preliminary information, there were no casualties," the official said.

Meanwhile, senior UN officials have strongly condemned the deadly Russian missile strikes in the Ukrainian city of Odesa on Sunday which damaged several historic buildings.

Over the past week, Russia has carried out aerial attacks on Odesa and two other port cities, Chornomorsk and Mykolaiv, since terminating the landmark Black Sea Initiative on grain and fertilizer exports.

International media reported that at least one person was killed and more than 20 wounded in Sunday's attack, which damaged significant cultural sites in Odesa, including the Transfiguration Cathedral, the first and foremost Orthodox church in the city.

The Cathedral was founded in 1794 and is located in the Historic Centre of Odesa, which was in January inscribed on the World Heritage List maintained by the UN Educational, Scientific and Cultural Organization (UNESCO).