BP PLC's board meeting to discuss Russian oil giant OAO Rosneft's offer, said to be for about $25 billion, for the U.K. company's 50% stake in TNK-BP started at around 1400 GMT Friday, people familiar with the matter said. The bid, which could set the stage for a deal that would unwind a profitable but troublesome partnership for the British energy company, was expected to consist of cash and Rosneft shares, people familiar with the matter said late Thursday
BP PLC's board meeting to discuss Russian oil giant OAO Rosneft's offer, said to be for about $25 billion, for the U.K. company's 50% stake in TNK-BP started at around 1400 GMT Friday, people familiar with the matter said.

The bid, which could set the stage for a deal that would unwind a profitable but troublesome partnership for the British energy company, was expected to consist of cash and Rosneft shares, people familiar with the matter said late Thursday.

Moscow-based Rosneft is separately negotiating to buy the other half of TNK-BP, which is owned by a group of Soviet-born billionaires known as AAR, for as much as $28 billion.

It is unclear how long the BP board will need to consider the offer. The board could be reconvened if a decision is not reached today, people familiar with the matter said.

There is no guarantee that either of the deals will go through.