The European Commission has accused Google of anti-competitive charges relating to its Android mobile phone operating system.
In a statement issued Wednesday, the commission – which is the executive arm of the EU - said it had informed Google that it believed the company had breached antitrust rules in the region and "abused its dominant position by imposing restrictions on Android device manufacturers and mobile network operators."
The commission said about 80 percent of smart mobile devices in Europe run on Android.
In a press conference Wednesday, European Competition Commissioner Margrethe Vestager said that Google had been sent a statement and would be given a chance to respond.
Vestager said Google's practices with Android could have a potential impact on a large number of companies.
"What we see is not only a restricting effect on search but also stifling competition and may be restricting innovation in the wider space," she said.
"And that is very important because a very strong motivation to innovators is that they can present their product to consumers. If that is not possible, then why bother?"
Vestager defended accusations that she was attacking U.S. firms in a bid to defend European firms.
"It is not our job to defend companies; it is our job to defend competition. That has been our job as long as can be remembered, no matter the flag of the country," she added.