by: Peter Lauria and Nadia Damouni | Reuters

(Reuters) - AllThingsD, the widely read technology blog run by Kara Swisher and Walt Mossberg, has begun discussions with owner News Corp about extending or ending their partnership, sources familiar with the situation told Reuters.

According to these sources, AllThingsD's contract with News Corp expires at the end of the year. One of the sources said Swisher and Mossberg have to deliver a business plan by next week to Robert Thomson, the former Wall Street Journal managing editor who will helm News Corp's publishing unit as CEO after it is spun off.