Google is to meet Groupon's board of directors by conference call today to decide how to proceed with a potential acquisition, according to a report by the Wall Street Journal (WSJ).
Google is reported to be in talks to buy online discount site Groupon for $6bn (£3.9bn). The WSJ said a person "familiar with the matter" confirmed the offer price "is a big number".
The New York Times reported that Google could reach a deal to buy Groupon by the end of the week, making it the largest ever acquisition for the search giant.
The deal would make Google the market leader in locally tailored discounts as well as being its biggest foray into local business advertising, the paper said, citing the company's previous attempts to buy local review site Yelp.
Google declined to comment on industry speculation and rumour.
The European Commission (EC) launched a formal investigation into Google's business practices yesterday after several complaints from rival search engines accused Google of abusing its position as the world's leading search service provider.