CNN  — 

The US government and 17 states are suing Amazon in a landmark monopoly case reflecting years of allegations that the e-commerce giant abused its economic dominance and harmed fair competition.

The groundbreaking lawsuit by the Federal Trade Commission and 17 attorneys general marks the US government’s sharpest attack yet against Amazon, a company that started off selling books on the internet but has since become known as “the everything store,” expanding into selling a vast range of consumer products, creating a globe-spanning logistics network and becoming a powerhouse in other technologies such as cloud computing.

The complaint alleges Amazon unfairly promotes its own platform and services at the expense of third-party sellers who rely on the company’s e-commerce marketplace for distribution.

For example, according to the FTC, Amazon has harmed competition by requiring sellers on its platform to purchase Amazon’s in-house logistics services in order to secure the best seller benefits, referred to as “Prime” eligibility. It also claims the company anticompetitively forces sellers to list their products on Amazon at the lowest prices anywhere on the web, instead of allowing sellers to offer their products at competing marketplaces for a lower price.

This is a developing story. It will be updated.