A group of US states led by Texas have filed an amended complaint against Alphabet Inc's Google accusing the tech giant of using coercive tactics and breaking antitrust laws in its efforts to boost its already dominant advertising business.

Four search engine rivals to Google have called on EU lawmakers to take action against the Alphabet unit via new tech rules.

Over thirty US states have sued Alphabet Inc.'s Google, accusing the search and advertising giant of operating like an illegal monopoly.

The antitrust overhaul package unveiled in Congress targeting Big Tech, if enacted, could have far-reaching effects on how people use the internet and on America's biggest and most successful companies.

Lawmakers in the House of Representatives are seeking to target US Big Tech with new antitrust bills, three sources familiar with the matter told Reuters.

Facebook has asked a federal court to dismiss major antitrust cases filed by the US Federal Trade Commission and nearly every US state.