Russia and Saudi Arabia will sign joint investment agreements worth more than $3 billion during a visit to Moscow by Saudi Arabia’s King Salman, Russian Energy Minister Alexander Novak was quoted as saying on Wednesday. The deals will include a $1.1 billion agreement for Russian petrochemical firm Sibur to build a plant in Saudi Arabia, the energy ministry cited Novak as saying in an interview with the Financial Times newspaper. A joint Russian and Saudi fund will invest $150 million in Russian private oilfield services firm Eurasia Drilling Company Limited, the ministry quoted Novak as saying.