Exxon Mobil has agreed to buy Kosmos Energy's stake in the Jubilee field in Ghana, three sources close to the matter said on Tuesday.

Private equity-backed Kosmos put its interests in the multi-billion barrel field, which it co-owns with UK-based oil explorer Tullow Oil and Houston-based Anadarko Petroleum, on the market earlier this year, industry sources previously said.

The sources did not say how much Exxon had agreed to pay but analysts have previously said the stake could be worth up to $5 billion.

The price, if disclosed, will be keenly watched by investors in Tullow and Anadarko, analysts previously said.

Exxon and Tullow declined comment and Kosmos and Anadarko were not available for comment.

The Jubilee field is one of the biggest oil discoveries in recent years and the auction attracted bidding interest from Western oil majors and state-owned Asian energy giants.

Termination notices have been sent to the losing bidders, one of the sources said.

Kosmos owns a 30.875 percent stake in the West Cape Three Points block and an 18 percent interest in the Deepwater Tano block offshore Ghana, in which Jubilee is located. (Additional reporting by Matt Daily in New York) (Reporting by Tom Bergin; Editing by Dan Lalor and Rupert Winchester)