Four men arrested on suspicion of murder after the death of 17-year-old Jack Gudge have been released on bail.

Jack, from Kinson, was found unconscious on the pavement outside Tesco Express in Winton at 12.55am on Saturday.

Despite police and paramedics efforts to save him, he was pronounced dead at Royal Bournemouth Hospital.

Police say a post-mortem examination indicated a brain injury, but was unable to provide the exact cause of death. Further tests need to take place.

Three men aged 27, 24 and 23, and a 15-year-old boy, all from the Bournemouth area, were arrested on suspicion of murder and are currently on police bail pending further enquiries.

Images of three of the men have been shared hundreds of times on Facebook, along with speculation about how Jack died and calls for justice.

Posting on Facebook this morning, Jack's mother wrote: “With a very heavy heart, me and his dad request that no one takes any action on their own behalf as this will affect the justice that Jack rightly deserves. Please share."

Chief Inspector Mike Claxton, of Bournemouth police, said: "This tragic incident has understandably shocked and upset the whole community and I send my condolences to the family and friends of Jack.

"Jack's family have asked that out of respect for him everyone remains calm and for people not to take matters into their own hands. His family has also asked to be allowed time to grieve in private.

"I would like to reassure the public that we have an expert team investigating the circumstances surrounding Jack's death and we continue to support the family throughout this difficult time.

“We appreciate everyone’s help with the investigation including those people that have already come forward and spoken to police and to those who have responsibly shared our social media appeals.

“There will continue to be a heightened police presence in the area while we continue with the investigation. If you do have any immediate concerns do not hesitate to speak to the local Neighbourhood Policing Team.

“We would also like to remind people commenting on social media that certain legal constraints apply as individuals have been arrested in connection with the investigation.

“It is understandable that people will wish to express their upset and offer sympathies to Jack’s family at this sad time, however posting well-intended but inappropriate comments on social media could cause problems with the investigation in the future.

"This includes any comments that could be deemed threatening towards those on police bail or proved to be inaccurate that could prejudice the ongoing investigation.

“This is particularly the case if you personally know the people involved or if you have provided any information to the police that may form part of any future court case.

“Thank you again for your ongoing support to this investigation and for reading this advice.”

Reverend Roger Constantine, senior team pastor at the Bournemouth Community Church in Moordown, led hundreds in silent prayer on the street this morning.

Before the service, he urged people to "be a comfort for one another".

He said: "I think Martin Luther King probably said it best - you don't fight darkness with darkness, you don't fight hate with hate.

"You can conquer things with love and respect and community action together.

"When you lose a loved one, you lose a friend, you've got lots of questions and things you want answered, but as a community young and old together, we can be a comfort for one another."

Dozens of flowers - including 24 red and white roses - have now been laid close to the crime scene by friends and family.

A candle had also been lit and tea lights were arranged into a heart shape.

Detective Chief Inspector Neil Devoto, of the Major Crime Investigation Team, said: “I am still appealing to anyone who may have witnessed the incident and who has not already spoken to officers to please come forward by calling 101 or contacting Crimestoppers anonymously on 0800 555111.

"Jack's family has been updated with the developments of the investigation by specially trained officers and our thoughts continue to be with them at this time."