Amazon's order of a big stake in food delivery group Deliveroo could be going astray.
The tech giant led a 575 million dollar fundraising for the UK-based firm in May.
That pitched it against the likes of Uber Eats and Just Eat in the global market for takeaway food deliveries.
But now UK regulators say the deal raises 'serious competition concerns'.
The Competition and Markets Authority flagged two problems.
It says the tie-up could deter Amazon from providing its own delivery service, to the detriment of consumers.
And it says competition could suffer in the emerging market for convenience grocery deliveries.
Amazon and Deliveroo have already established leading positions in that market.
Now the regulators say they could start a full investigation of the deal.
That's if the two firms fail to provide legally binding proposals that address the concerns.