Google has announced that, beginning this week, articles hosted on Google News will be fortified by advertising.

"[When] you click on a Hosted News article, in addition to photographs, maps, and related stories, you'll also see contextually relevant ads underneath the main story text," Google explained.

The newly-availed ad space is part of an ongoing push to squeeze more profit out of its existing high-traffic sites. Earlier this month Google began testing expandable ads for AdSense and AdWords; late last year, it began pushing ads on Google News and in YouTube search results.

On Search Engine Land, Sandra Baron of the Media Law Resource Center suggested Google may face legal liabilities associated with advertising on hosted articles within Google News.

"A significant issue for content providers is whether or not what Google provides becomes a substitute for going to the actual content providers site. When that tension becomes too great, people seek legal solutions to it," she said.

It has not been revealed whether publishers will receive profits associated with the ads.

Last week Google announced plans to begin experimenting with behavioral advertising. AdSense advertisers were asked to update their own privacy policies in compliance.