It looks like Twitter's recent app expansion effort might just be getting started.

The microblogging site is getting ready to announce its own photo-sharing service this week, according to a TechCrunch report that cited multiple anonymous sources.

Twitter users can already share photos on their Twitter streams via Twitpic and Yfrog, but as the report noted, a built-in service would have a significant advantage over competing apps.

The site is also close to acquiring AdGrok, a platform for bidding on keywords on Google AdWords, for less than $10 million, according to a separate TechCrunch report citing multiple sources.

Twitter's official media relations feed had no comment on the reports.

Twitter confirmed on Wednesday it would acquire the popular desktop client TweetDeck for $40 million.