The Advertising Standards Authority will investigate a Paddy Power advertising campaign after receiving nearly 50 complaints.

The complaints are aimed at a campaign that relates to the Oscar Pistorius murder trial, where the Irish bookmaker are offering 'money back' if the South African Paralympian is found not guilty of murdering girlfriend Reeva Steenkamp.

The print advert reads: "It's Oscar Time. Money back if he walks. We will refund all losing bets on the Oscar Pistorius trial if he is found not guilty."

An online petition to remove the advert on website Change.org has also attracted over 110,000 signatures.