Burger King Offering One-Cent Whoppers… At McDonald's?

LOS ANGELES (CBSLA) – Burger King is taking its latest marketing campaign straight to its biggest competitor, literally.

The fast food giant announced Wednesday that it's offering one-cent Whoppers to anyone who is standing near a McDonald's restaurant.

Burger King is calling the campaign the Whopper Detour.

Here's how it works: You have to download the Burger King app, then get within 600 feet of any McDonald's. That will unlock the promotion which will allow you order a Whopper for a penny.

You can then visit any Burger King to pick up your sandwich.

Burger King says the app uses the GPS technology "geofencing" to determine if you are within range of a McDonald's.

A nifty ad posted to YouTube shows people going through a McDonald's drive-thru and ordering Whoppers, to the confusion of McDonald's staff. However, on Twitter, Burger King assured the public they do not need to go through a drive-thru to get the promotion.

"If you happen to be going to McDonald's today, drive safe," Burger King wrote on its Twitter page.