Police arrest a girl and two boys on suspicion of murdering a teenager who is stabbed to death in south London. Sky News reports that the victim is named and that the arrests follow the fatal stabbing. Other coverage aggregated by Google News indicates a murder investigation is underway after a boy is stabbed in Battersea, with authorities searching for information and tracing events around the incident. Multiple outlets report that the three young suspects are detained in connection with the killing and that detectives are treating the case as a homicide. The reports also describe an ongoing investigation, including efforts to establish the circumstances leading to the stabbing and to identify any additional people who may be involved. Authorities do not describe additional details in the provided summaries, and the information remains limited to the arrests and the fact that the teenager dies from stab injuries in the south London area of Battersea. Further developments are expected as the investigation continues.