British energy giant BP on Monday said it had sold a 20-percent stake in Oman's block 61 gas field to Thailand's state-controlled PTTEP for $2.6 billion (2.15 billion euros). BP, which like its peers has been hit hard by coronavirus lockdowns that have slashed energy demand, will retain a 40-percent stake and continue to operate the block, it added in a statement. bcp/rfj/rl