Google News blog in the post titled "Quantity and quality" reports about a couple of changes in Google's new algorithms "We are constantly improving our algorithms to bring you a better organized, more relevant selection of the day's news. This is an ongoing process, but in the past few months we have been working on a number of improvements that we hope bring us closer to this goal."
The post cites two changes, the first is about news updates "…we recently released is a new algorithm to help determine the most recent update to a story. In other words, it lets us find something new that's been added to a breaking story. So instead of just seeing the most recent publishing activity for a breaking story, we highlight the sources which brought you the information in the first place. Once there's new information from another source, we update our results so you get any new developments to the story."
The second one relates to the local context of the news "In order to provide a local angle to global events, we have started actively promoting high quality local reporting in addition to coverage from foreign sources. This means we try to find sources at the scene of a story who are doing original reporting. It may be a national or international story with many sources from around the world reporting on it, but often times one of the best sources of information on a story are those closest to it."
Nice fine tunig of the News algorithms.