KYIV, Aug 24 (Reuters) - Ukraine's navy and military intelligence carried out a "special operation" overnight in which units landed on Russian-occupied Crimea, the defence ministry's Main Directorate of Intelligence (HUR) said on Thursday. The operation, which Reuters was unable to independently confirm, would amount to a rare demonstration that Ukrainian forces are able to stage ground operations in Crimea, which Russia seized and annexed in 2014. See here for a complete list of exchanges and delays