Bid speculation continues to push the BP share price higher. Exxon Mobil and Chevron have been told by the White House that it will not block a bid for BP. There is also speculation that BP is in talks with US independent oil company Apache over the sale of some of its assets in a deal that could raise up to $12bn.BP said the cost of the clean-up in the Gulf of Mexico has risen to $3.5bn, from $3.12bn a week ago.Oil services provider Petrofac has won its first production enhancement services contract in Romania after tying up a deal with Petrom, which owns the Ticleni oilfield and its eight satellite fields.Rio Tinto has referred Canadian miner Ivanhoe's breaches of a private placement agreement to arbitration. The mining heavyweight, which recently increased its stake in Ivanhoe to 29.6%, warned Ivanhoe that its shareholder rights plan would breach Rio Tinto's contractual rights. Most other miners are lower led by Kazakhmys and ENRC.FTSE 100 - RisersBP (BP.) 399.15p +9.42%Antofagasta (ANTO) 908.50p +2.54%Cobham (COB) 233.30p +2.10%Cairn Energy (CNE) 460.00p +2.09%Petrofac Ltd. (PFC) 1,260.00p +1.94%Investec (INVP) 476.00p +1.71%Aggreko (AGK) 1,569.00p +1.69%Hammerson (HMSO) 360.00p +1.41%G4S (GFS) 268.60p +1.40%Sage Group (SGE) 237.70p +1.32%FTSE 100 - FallersKazakhmys (KAZ) 1,068.00p -1.84%Rio Tinto (RIO) 3,124.00p -1.53%TUI Travel (TT.) 219.70p -1.39%Kingfisher (KGF) 216.80p -1.14%BHP Billiton (BLT) 1,833.50p -1.03%BT Group (BT.A) 138.60p -1.00%Admiral Group (ADM) 1,460.00p -0.95%International Power (IPR) 315.70p -0.91%Vedanta Resources (VED) 2,282.00p -0.78%Man Group (EMG) 218.00p -0.77%