Another Russian drone attack on Kyiv. Explosions were heard in the Podil district, which is close to the city centre. Ukraine, for its part, is said to have attacked targets in Crimea. Russia has intensified its air strikes on Ukraine in recent days, using drones, ballistic missiles, hypersonic missiles and cruise missiles. The Iranian-made drones used are usually launched in swarms and fly with many course changes before crashing into a target with their explosive charge. The Russian military said it had repelled Ukrainian drone attacks on the Crimean peninsula, which Russia annexed in 2014.