The mother of a teenage boy who is in a critical condition in hospital after he was attacked by a gang in a street attack has issued an emotional appeal for information.
Jamel Boyce, 17, was stabbed in the chest and leg in Clapham, south London, just after 7pm on Friday, October 14.
Detectives said the business student was involved in an "altercation" with four men next to the Sainsbury's supermarket car park in Triangle Place.
It is understood that the group fled the scene on foot in the direction of Nelson's Row, Clapham Park Road or Clapham High Street.
Police also want to speak to anyone with information about a dispute Jamel was involved in at a McDonald's restaurant on Clapham High Street at about 3pm earlier in the day.
Jamel's mother, Pansy Boyce, said:
Two 20-year-old men and five boys aged between 16 and 17 have been arrested on suspicion of attempted murder, the Metropolitan Police said.
All seven have been released on bail, the force added.
Detective Sergeant Paul Graves said: "From speaking to witnesses it now appears that the incident in which Jamel received his injuries would have appeared innocuous at first glance and people may not have realised he had been stabbed.
"Members of the public often use this route to access the supermarket and it may be that people have witnessed what appeared to be a minor scuffle and dismissed it as a trivial event.
"However, Jamel has received injuries that have left him critically ill and I would appeal to anyone who was in the vicinity at around 7pm that evening to come forward and speak to police.
"Any information, no matter how insignificant it may seem about either incident, could prove vital to this investigation."