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I'm sure you've gone over this and if so feel free to ignore me but did you make sure your sitemap is up to scratch - https://support.google.com/news/publisher/answer/184732?hl=en You can also look to see if your data is up to par - https://developers.google.com/structured-data/testing-tool/ You can always work back from the date it stopped working see if you've done anything that may have caused this (some one changing a tag etc.) lastly there is always the giant list of things to check for Google news - http://www.adamsherk.com/seo/the-most-common-google-news-errors/ Best of luck and let us know how you get on.