Search engine firms Yahoo! and Google have agreed to delay the start of their search advertising partnership in order to give justice department investigators more time to look into its antitrust implications, it has been reported.

The deal calls for Google to place adverts alongside some search results on Yahoo!, the New York Times notes.

In a statement, Yahoo! said: "The companies have agreed to a brief delay in implementing this agreement to continue our ongoing discussions with the Department of Justice."

The search engine firm said it has had discussions with regulators and looks forward to answering their queries about the agreement.

Google added: "We have agreed to a brief delay in implementing the agreement," according to web resource CNet.

In other search engine news, Reuters reports has announced it is receiving an overhaul in order to deliver results faster and with improved relevance, as it aims to grow its market share.

Katherine Griwert is Brafton's Marketing Director. She's practiced content marketing, SEO and social marketing for over five years, and her enthusiasm for new media has even deeper roots. Katherine holds a degree in American Studies from Boston College, and her writing is featured in a number of web publications.