A window has been damaged in what police believe to be a "firearms discharge" near a Hertfordshire park.
The suspected discharge reportedly occurred around the East Drive Recreation Ground on North Western Avenue in Watford.
The incident occurred at around 8.45pm on Friday (November 6) and caused damage to a window.
Hertfordshire police confirmed it is supporting victims who "may not have been the intended target".
The force said it is working to establish the circumstances of the incident and where the shot was fired.
Detective Superintendent Mark Clawson said: "Since the incident was first reported to us, officers have been conducting numerous CCTV and house-to-house enquiries.
"Work is ongoing to find out exactly what happened, and I appreciate the nature of this incident is concerning.
"We are asking anyone who was in the area at the time and who has not yet spoken to officers to get in touch as soon as possible.
"It is not always appropriate to disclose sensitive live-time investigative information to those not directly affected by the incident, especially as our detectives look to speak to independent witnesses.
"Further updates will be provided when appropriate to do so."
Reports can be made online, by calling 101, quoting 41/107065/26., or by calling Crimestoppers on 0800 555 111
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