The BBC has confirmed that Sherlock, its modern spin on the Sherlock Holmes stories, is to return for a second series.

Three more episodes of the show are to be made and screened in Autumn 2011, following the success of the first series which attracted around nine million viewers when it was shown over the summer.

Sherlock, which stars Benedict Cumberbatch and Martin Freeman as Holmes and Watson, is also due to be screened on US TV.

“There’ll be baffling new puzzles, old friends and new enemies – whether on two, or four, legs,” said co-creators Mark Gatiss and Steven Moffat.

“And we might well be seeing the cold master of logic and reason unexpectedly falling. But in love? Or over a precipice? Who can tell?”

The show is one of several new commissions for BBC One which also include new episodes of the detective drama Luther.

“Sherlock was the hit of the summer, Luther the most memorable new detective on the block,” said BBC One controller Jay Hunt.

“I am delighted they will both be returning to BBC One.”