Women in a US city who can belch on command are being given the chance to earn some extra cash.

An ad agency is offering ladies $750 - the equivalent of £450 - for burps of any size in St Louis, Missouri.

They want belches "from small, quiet burps to monstrously loud belches" for a fizzy drink commercial.

The ad on the local version of Craigslist says women who are interested do not need any previous acting experience.

They just need to be aged between 18 and 40, be able to burp to order and be available for filming at the end of April.