A man arrested over the murder of 15-year-old Billy Cox has been released on police bail.
Billy Cox was shot on Valentine's Day
The 20-year-old was held when armed officers raided a property near Clapham High Street, south London.
He is thought to be the first person arrested over the murder of Billy, who was shot at his home in Clapham North, south London, on 14 February.
Four others arrested during the operation on Wednesday on suspicion of dealing drugs were also bailed.
Billy was found dying by his sister who rushed inside the maisonette in Fenwick Place after hearing a "loud bang".
He was the third teenager killed in south London during a two-week spate of shootings.