A 62-year-old woman was found in bushes with self-inflicted neck injuries from two airguns in Sidcup on Monday morning.
Police and London Ambulance Service were called to the recreation ground in Longlands Road at 7.55am.
Upon arrival officers found the woman lying in the bushes with the air guns pointing at her neck.
A Met Police spokesman said: "Officers talked the woman into handing the weapons over to them and detained her under the Mental Health Act.
"She was taken to a south London hospital for treatment to her injuries."
The woman’s injuries are not considered life-threatening.
- Two rail strikes set to cause 'travel chaos' across south-east London and Kent
- UPDATE: Air ambulance called to pedestrian hit by a lorry on A2 with multiple 'serious' injuries
- VIDEO: Orpington schoolgirl, 12, star of flick recognised at Cannes Film Festival
- Child actors from south east London star in London production of The Railway Children
- Oscar Wilde classic - adapted by his grandson - comes to Greenwich tonight