Hapag-Lloyd and CMA CGM said they would comply with the US Federal Maritime Commission (FMC) probe into congestion fees that liner operators have begun charging shippers.

The FMC announced on Wednesday last week that it was requesting documentation from eight companies to see if new fees charged ostensibly due to congestion were implemented properly.

The other six liners targeted are HMM, Matson, Mediterranean Shipping Co, Orient Overseas Container Line, SM Line and Zim.