Air defence systems have shot down two unmanned aerial vehicles on an approach to Moscow, city Mayor Sergey Sobyanin was quoted as saying by TASS news agency.

He said no injuries were caused due to the incident.

"Two combat drones have attempted to fly to the city. Both were shot down by air defence systems, one in the Domodedovo area, and another one in the vicinity of Minskoye Highway. No injuries have been reported," Sobyanin wrote on his Telegram channel as quoted by the Russian news agency.

Meanwhile, a UN spokesperson on Monday said attacks against Ukrainian port infrastructure are not isolated and with Russia’s termination of the Black Sea Initiative, are impacting global food prices and affecting the most vulnerable people.

Farhan Haq, Deputy Spokesman for Secretary-General António Guterres, made the comment while speaking at the regular press briefing at UN Headquarters in New York.

The Danube port of Izmail, in the Odesa Region, was hit on 2 August. The attack damaged facilities storing thousands of tons of food grains.

“The Secretary-General also condemned Russia’s intensification of attacks on Ukrainian ports, calling for the immediate cessation of all attacks against civilians and civilian infrastructure in Ukraine,” he said.

The Black Sea Initiative enabled the export of millions of metric tons of food from Ukrainian ports, and together with the UN’s parallel accord with Russia on export of food and fertilizer, had been vital for global food security and price stability, including in areas hit hard by conflict and hunger, such as Afghanistan, the Horn of Africa and Yemen.