Two teenagers and two adults were arrested and one person was injured following a fight in St Albans.
Police received multiple calls at around 5.15pm yesterday to an altercation near the Shell Garage in Beech Road.
Armed officers attended the scene following reports that a knife had been seen.
No one was injured during the incident, but one person is believed to have sustained an injury to their arm before the fight took place.
A 17-year-old boy was arrested on suspicion of GBH and possession of a bladed article, and a second 17-year-old boy was arrested on suspicion of GBH, possession of a bladed article, possession of cannabis and assaulting a police officer.
A 20-year-old man and a 20-year-old woman were both arrested on suspicion of affray.
All four have been released under investigation while enquiries continue.
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