Ibrar Hussain and Hassan Ali Rehman pleaded guilty at Leeds Crown Court to the manslaughter of 17-year-old Amar Aslam, who died from head injuries in Crow Nest Park, Dewsbury, West Yorkshire, on May 25.

Amin Hussain Ali, 20, and Asif Khan, 16, yesterday admitted murdering Amar and robbing him of a sum of money, a mobile phone, a chain and a quantity of cannabis. A fifth defendant, a 16-year-old boy who cannot be named for legal reasons, was discharged from the court after the prosecution offered no evidence against him.

All five defendants were due to go on trial on Tuesday charged with the murder and robbery of Amar.

Ali, of Field Lane, Ravensthorpe, West Yorkshire, and Khan, of Broomer Street, Ravensthorpe, entered guilty pleas to the charges at the beginning of the trial on Tuesday.

Hussain, of North Stead Avenue, Ravensthorpe, and Rehman, of Broomer Street,yesterday entered guilty pleasto the lesser charge of manslaughter, which were accepted by the prosecution. Mr Justice Maddison said a not guilty verdict would be appropriate in respect of the fifth defendant.

Ali and the three 16-year-olds will be sentenced at Leeds Crown Court at a later date.