Market authorities said the companies did not provide the requested information by the deadline of December 18, and now they are waiting for a thorough investigation.
Britain's competition regulator today launched an in-depth investigation into Amazon's bid to buy part of online takeaway delivery group Deliveroo.
The Competition and Markets Authority (CMA), which launched an initial probe in June, said on Friday it had chose to move to a Phase 2 investigation as Amazon and Deliveroo had not addressed its concerns before a December 18 deadline.
The Competition and Markets Authority (CMA) announced on Friday it has now entered phase 2 of the investigation, with a decision to be released "as soon as is reasonably practicable".
There is a risk of an in-depth review, which could take up to six months if companies fail to address these concerns.
These were the details of the news Amazon's Deliveroo deal gets United Kingdom antitrust probe for this day.
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The CMA previously raised concerns that the deal could discourage Amazon from re-entering the restaurant food delivery sector, having previously launched and closed its Amazon Restaurants business a year ago.
"We are confident that we can convince the CMA of the facts that this minority stake will bring to competition by helping restaurants grow their businesses, do more work for drivers, and increase choice for customers".
"Amazon believes that this investment funding will lead to more pro-consumer innovation by helping Deliveroo continue to build its world-class service and remain competitive in the restaurant food delivery space", an Amazon spokesperson said in a statement.
Amazon was unable to set up its own restaurant business in the United Kingdom, which led to the closure at the end of past year.
Created in 2013, Deliveroo has grown to delivering meals to clients in more than 200 cities across 12 countries.