Three teenagers who threatened a home owner with machetes were arrested after trying to break into a house on Sunday night.
At around 6.10pm on Sunday police were called to an address on Whitefield Meadow in Bamber Bridge.
They had received reports that four people, carrying machetes, were attempting to enter a house on the street, and had threatened one of the occupants.
The men left the address when they heard the police arriving.
Following a search of the immediate area, a 19-year-old man from Wesham was arrested on suspicion of a public order offence, with a 17-year-old boy from Chorley arrested on suspicion of assault.
An 18-year-old boy was arrested on suspicion of possessing an offensive weapon.
They are all currently in custody, but a fourth person ran from police.
A number of weapons were also recovered.
Insp Dean Khan, of Lancashire Police, said: “An investigation is underway after a serious public order incident in Whitefield Meadow.
“While we have made a number of arrests I would encourage anyone with information about what happened to come forward.
“This is clearly a concerning incident which will have no doubt worried many people on the street and the immediate area.
“I would like to reassure you officers reacted quickly and patrols have been increased to support our investigation and further enquiries.”
Anyone with information can contact police on 101 quoting log 1337 of September 19.
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