A gun and a machete were found after armed police raced to break up a large fight between teenagers on the streets of the West Midlands.
A member of the public called 999 after seeing a group of young men clashing, and six suspects were arrested.
Police found a gun under a parked car, along with a knife and a machete, after the area was cordoned off.
More than 20 officers, including a specialist firearms unit, were sent to the scene on Albert Road in Aston, Birmingham, at around 6.30pm yesterday.
Four boys aged 17 and two aged 18 were arrested on suspicion of possession a firearm with intent to cause fear of violence. They were held near the junction with Whitehead Road
Police today said it was not clear if anyone was injured, but they suspect more people were involved in the trouble.
Det Sgt Adam Hicklin from West Midlands Police Force CID, said: "No-one has presented to us as a victim and we are not aware of any injuries − but clearly this disorder was shocking for people who witnessed it and totally unacceptable.
"We’re grateful that someone made a swift 999 call which meant we could get response and firearms officers to the scene quickly and make arrests.
"The weapons we’ve seized will be forensically examined and we will be examining local CCTV in a bid to find out exactly what happened.
"We suspect more youths may have been involved in the disorder and I would urge anyone who witnessed what happened − or saw people running from the scene − to contact us in confidence."
Contact Bournville Lane police station on 101 or Crimestoppers anonymously on 0800 555111.Subscribe to our Newsletter