US President Donald Trump said he is opening a trade investigation into the European Union after Brussels imposed a roughly $1 billion fine on Google for breaching competition rules. He also warned that tariffs on the bloc could follow, escalating a dispute that now links tech regulation with wider trade policy.

The move came after EU authorities penalized Google under European antitrust law. Trump presented the case as part of a broader problem for American businesses operating in Europe, arguing that US companies are being treated unfairly by Brussels.

By tying the Google decision to a potential trade response, the White House signaled that it may treat European actions against major US technology groups as more than a regulatory matter. That raises the stakes for relations between Washington and the EU, where disagreements over market rules, corporate power and cross-border commerce have already created tension.

The announcement points to a possible new front in the transatlantic dispute, with tariffs now being discussed alongside competition enforcement. While the investigation is only the first step, Trump’s warning suggests the Google fine could become a flashpoint in a wider US-EU trade confrontation.