KYIV, April 28 (Reuters) - Russia hurled missiles at cities across Ukraine as people slept on Friday, killing at least 25 civilians in the first large-scale air strikes in nearly two months, as Kyiv said it was nearly ready to launch a huge assault to retake occupied land. Officials said at least 23 civilians were killed, including four children, with an estimated 109 people living in the part of the block that was hit and 27 flats completely destroyed. See here for a complete list of exchanges and delays