Google is reported to be in talks to buy online discount site Groupon for $6bn (£3.9bn).
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, said the New York Times, citing the company's previous attempts to buy local review site Yelp.
The Financial Times suggested an acquisition of Groupon could help Google rival Facebook, "As local advertising becomes a battleground between Google and Facebook - in which DST has also invested - Groupon's ability to target potential customers geographically is useful."
Google was reported earlier this year to be in talks with Paypal about integrating the eBay-owned payment service with the search giant's Android smartphone software.