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Shares of Twitter jumped over 20 percent on Friday morning following a report that Google and Salesforce are among companies interested in purchasing the social company.

Rumors of a Twitter sale are nothing new, but "people close to the situation" are telling CNBC that members of the company's board of directors are eager to deal. While a sale is not imminent, one of the sources said conversations with suitors are "picking up momentum" and could result in a deal by the end of the year.

Twitter’s board is comprised of Omid Kordestani, Jack Dorsey, Peter Fenton, Hugh Johnston, Martha Lane Fox, Debra L. Lee, David Rosenblatt, Marjorie Scardino, Bret Taylor and Evan Williams.

It was Williams, a co-founder and former CEO, who sparked another recent share spike when he told an interviewer in late August that "as a board member we have to consider the right options [for a possible sale]." In that case, shares jumped as high as $19.60. At press time, the price was up to $22.37.

Twitter did not immediately respond to a request for comment on the report.

On Friday morning, Vala Afshar, the "chief digital evangelist" at Salesforce, appeared to confirm his company's interest by tweeting "Why @twitter?" and listing positives like "the best realtime, context rich news" and Twitter's ability to "democratize intelligence." Less than an hour later, Afshar clarified that he was just expressing his personal views on the company.