Russia has blamed Ukraine for being behind a drone attack that damaged no less than two buildings in the capital Moscow early on Monday morning.

The Russian defense ministry said two drones were "suppressed and crashed", adding that there were no casualties.

Russia's state-owned Tass news agency reported that one drone fell near the defense ministry.

Ukrainian officials are yet to remark, yet they rarely claim responsibility for attacks inside Russia.

In a different turn of events, Russian-installed officials ordered people to evacuate one district of Crimea - the Ukrainian southern peninsular annexed by Moscow in 2014 - after a reported overnight Ukrainian drone attack.

Kremlin-appointed regional head Sergei Aksenov said an ammunition depot was hit in the northern Dzhankoi area, and residents of nearby villages were told to leave their homes. He reported no casualties.

Meanwhile, Ukraine said four people were injured and a grain hangar was destroyed in new Russian drone attacks on its southern Odesa region. It said the country's port infrastructure on the Danube was targeted.

Russia has been launching near-constant attacks on the Odesa region - where Ukraine's major Black Sea ports are located - since Russia withdrew from a landmark grain deal last week.

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