Malaysia's state energy firm Petronas on Friday said it has withdrawn from Blocks M12, M13 and M14 located in the Yetagun gas field off Myanmar, the latest exit by a major energy company since last year's military coup.

International companies doing business in Myanmar have come under pressure from rights groups and Myanmar's shadow civilian government to review their operations and stop payments flowing to a military government that seized power from an elected government and has brutally cracked down on dissent.