Burger King signs are seen outside the fast food restaurant in Annandale, Virginia.

London - Burger King’s Twitter feed on Monday fell victim to hackers who changed its branding to that of rival McDonald’s.

No one has admitted being behind the stunt, but hacking collective Anonymous tweeted about the incident extensively.

The Burger King account was suspended on Monday night but a screen-grab posted by @AnonymousPress showed it saying: “Burger King USA official Twitter account. Just got sold to McDonald’s because the whopper flopped.”

Posts from the Burger King account earlier on Monday also contained racial slurs, references to drug use and obscenities.

A tweet posted on the @YourAnonNews account at 9.47am read: “We’re guessing the @BurgerKing social media team is having a bad day?.?.?.”

A spokesman for Burger King said: “It has come to our attention that the Twitter account of Burger King brand has been hacked.

“We have worked directly with administrators to suspend the account until we are able to re-establish our legitimate site and authentic postings.

“We apologise to our followers who have been receiving erroneous tweets about other members of our industry and additional inappropriate topics.” - Daily Mail