The four, aged 16, 17, and two 19-year-olds, are accused of killing Les Reed, 45, on the Ely Estate, Cardiff and the attempted murder of Philip Tull, also 45. Mr Tull was 'satisfactory' in hospital with multiple injuries last night. Four youths aged between 17 and 22 were released without charge.
Earlier, the Rev Bob Morgan, vicar of the Church of the Resurrection in Ely, called on local men to band together to protect their community against crime.
Mr Morgan suggested the foundation of a Les Reed society to tackle intimidation on the estate, which was the scene of summer riots two years ago.
Mr Reed, a redundant steel worker and father-of-three, was walking home with MrTull 45, from a social club on Friday night when the incident occurred. His widow, Linda, 44, said: 'He was a very caring man - all he wanted to do was try to protect his family and his community.'