TAV Havalimanlari Holding AS, Turkey’s biggest airport operator, is planning to bid for concession contracts for four airports in Nigeria, according to two people with knowledge of the matter.

The Istanbul-based company, majority owned by Aeroports de Paris, has already submitted a non-binding bid for the airports, which include those in Lagos and Abuja, the people said, asking not to be named because the plan isn’t public. The company is also considering capital expenditures in some of the four airports if it wins the contract, one of the people said.

TAV operates more than a dozen airports including Turkey’s largest, Istanbul Ataturk. It is seeking to add more airports abroad to its portfolio to compensate for the termination of the concession agreement for Ataturk, its biggest revenue earner, at the end of 2020.