"The air defense forces repelled an attack by four drones heading toward Moscow," he wrote. "Emergency service specialists are working at the sites where debris fell." Read also: Drone attack hits Moscow suburbs,

The Ministry of Emergency Situations of Russia has issued instructions according to which civilians "in no case should", in particular, "shoot down drones with improvised objects and other means," as well as use "radio equipment and mobile phones and GPS devices near the drone.

Ukrainian drones targeted Moscow for a second time this week, with city authorities saying early Friday that air defense systems downed four unmanned aircraft near the Russian capital. Moscow Mayor Sergei Sobyanin said emergency crews were dispatched to areas where debris from the intercepted drones had fallen.

Ceasefire efforts come at a time when Ukraine is fast losing ground on the battlefield amid a freeze in US military aid and intelligence sharing