Yelp says it bought online food delivery service Eat24 for $134 million

The war over takeout is heating up with Yelp's purchase of Eat24 for $134 million.

Eat24 allows users to order takeout from nearby restaurants online or with an app. It makes money by keeping a percentage of sales from restaurants.

Online review company Yelp will be competing with GrubHub Inc., the leader in the competitive online food ordering market. GrubHub, which also owns the Seamless service, is used by 30,000 restaurants in the U.S. and London.

Yelp says about 20,000 restaurants use Eat24. It plans to expand the service to 1 million restaurants that have been reviewed on its site.

San Francisco-based Yelp also on Tuesday raised its outlook for the year.

Shares of Yelp Inc. jumped 6.5 percent to $44.91 in afternoon trading Tuesday.