Two teenagers have been arrested on suspicion of murder after the death of a 16-year-old boy in north Kent.
Michael Chapman, 16, died in Sittingbourne on Friday night
Michael Chapman, whose body was found on a playing field, died as a result of "an unprovoked, violent assault" on Friday night.
An 18-year-old man and a 16-year-old boy were held on Saturday and are being questioned at police stations in Kent.
Michael lived in the Sittingbourne area and was a pupil at Westlands School, in Westlands Avenue.
Police said his body was found in the area of the upper playing fields at Gore Court Cricket Club, in Key Street, Sittingbourne at about 2300 BST on Friday.
A post-mortem examination showed no weapon was used in the attack.
A mobile police station has now been set up at the scene for people to speak to officers if they have any information.
Det Supt Lee Catling said: "I want to appeal to people to come forward with information about Michael's tragic death.
"Anyone who knows why someone would want to hurt Michael must come forward and talk to us.
"Michael died in an area we know is popular with young people and I appeal to anyone who was there on Friday night to contact us."
Speaking from the spot where her son died, where dozens of floral tributes had been laid, Sue Chapman said: "Michael was a wonderful 16-year-old - loving, thoughtful, happy, cheerful.
"Everybody loved him, he wasn't hated by anyone. We just want any witnesses at all that were around...to come forward."
The 40-year-old nurse added: "Please just find the people that did this to my son and David's brother, that's all we ask for."
David, 18, said that Michael was a "great brother".