Overview
- British Transport Police were called to Balham Underground at 6:11pm on 17 November after reports of a young man with a knife.
- Witnesses described a large knife or machete and said the suspect ran toward passengers before jumping the barriers and escaping.
- Social-media footage shows commuters ducking and sheltering inside a Northern line carriage as the incident unfolded.
- No injuries have been confirmed, and the suspect remains at large as inquiries continue.
- Investigators appealed for information and asked witnesses to contact BTP on 61016 or 0800 40 50 40, quoting reference 511 of 17 November.