on online platforms such as twitter, lichan and telegram, as well on the messaging platform discord. the leak reveals information about the deployment and state of ukrainian and russian forces ahead of a ukrainian spring offensive and appear to outline us training and equipment being provided to ukraine ahead of that offensive. there are also suggestions that ukraine s air force may not be able to withstand more russian attacks. other leaked material included intelligence on other countries such as china, israel, and south korea. officials say they do not currently know the source of the leaks. the bbc s barbara plett usher has more. the pentagon says the us is still very much in the finding out phase. we are told that this is a serious risk to us national security and that it is a matter of top priority. a number of government agencies are working together to try to find out how this happened and what the potential impact is. the secretary of defence is meeting every day wit
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