Two youths have been arrested by detectives investigating the shooting of two teenagers at a McDonald's restaurant in south London.
The shooting happened inside McDonald's
A gunman opened fire in the fast-food restaurant in Brixton, which was packed with families at the time, on Thursday 28 September.
Both victims, aged 17, were shot at close range, one in the chest and the other in the arm.
Police said there was no evidence to suggest the shooting was gang-related.
The victim shot in the arm was treated in hospital and discharged, while the boy shot in the chest is still in a stable condition in hospital, Scotland Yard said.
Officers from the Metropolitan Police's gun crime unit Trident are investigating the case.
"Both males are currently in custody at separate south London police stations," a police spokesman said.
Detective Chief Inspector Andy Shrives, who is leading the investigation, renewed his appeal for witnesses.
"The information they provide will be treated confidentially and professionally and we are committed to ensuring that witnesses and family members are supported and, if necessary, protected."
The shooting took place at about 1725 BST in the restaurant at the junction of Brixton Road and Coldharbour Lane.
Families and schoolchildren were in the restaurant at the time.
A Scotland Yard spokeswoman said: "We now know prior to the shooting the victims were involved in a brief verbal argument with some other people in the restaurant and then three to four minutes later the shooting occurred.
"It is also thought that the victims and the gunman may have known each other, but it is not certain."
The gunman is believed to have escaped on a bicycle along Brixton Hill but was originally thought to have escaped on foot.