Opet Petrolculuk AS, the State Oil Co. of the Azerbaijan Republic and private equity firms are also among the companies that made offers, said the people, who asked not to be identified because the process isn’t public. BP Plc and Saudi Arabian Oil Co., known as Aramco, are also weighing bids, the people said.

A sale could value the business at about $1.2 billion, two of the people said. No final decisions have been made and these companies may not submit successful bids, they said.

OMV bought Petrol Ofisi for more than $2.5 billion from Dogan Sirketler Grubu Holding AS, a Turkish group with wide-ranging interests in media, energy and real estate, in several stages between 2006 and 2010. The company operates 1,785 petrol stations in Turkey and owns the country’s largest fuel storage and logistics business.

A spokesman for OMV said the process to sell Petrol Ofisi is under way, declining to comment further. Representatives for Opet, Socar, BP and Vitol declined to comment. Representatives for Trafigura and Aramco didn’t immediately respond to requests comment. Opet is owned by Koc Holding AS, Turkey’s biggest business group, and the Ozturk family.

Aramco is looking at downstream opportunities in Turkey and will sign an MOU with 18 Turkish companies later today, CEO Amin Nasser said at the World Energy Congress in Istanbul, without naming the companies.

OMV agreed Monday to sell part of the unit, the Aliaga fuel storage terminal, to a group led by Socar. The company had previously said the entire business has a book value of 1.6 billion euros ($1.8 billion), though it may fetch $1.3 billion or less in the sale, according to Bloomberg Intelligence.

OMV is selling assets and cutting jobs after the slump in oil and gas prices forced it to write down about 3.5 billion euros of assets including its costly North Sea oil investments. It agreed last month to sell a 601 million-euro stake in Gas Connect Austria GmbH to Italian pipeline operator Snam SpA and German insurer Allianz SE.