Boy, 15, has been arrested on suspicion of murder and is being held at a south London police station
A second teenager has been arrested on suspicion of murdering 15-year-old Zaian Aimable-Lina, who was stabbed to death in a park in south London on Thursday.
A 15-year-old boy was arrested on suspicion of murder late on Saturday and is being held at a south London police station, the Metropolitan police said.