"Part of our organizational streamlining involves cutting our investment in underperforming or off-strategy products to put better focus on our core strengths and fund new innovation in the next year and beyond," a spokeswoman said via e-mail.

According to a Yahoo corporate slide that made the rounds on Twitter Thursday, the services to be shut down include social bookmarking pioneer Delicious and geolocation tool Fire Eagle.

However, the HP spokeswoman would only confirm the upcoming demise of the social news site Buzz and Yahoo's Traffic APIs (application programming interfaces).

"We will communicate specific plans when appropriate," she wrote.

Earlier this week Yahoo confirmed it was laying off 600 staffers, or about 4 percent of its global workforce.