A man threatened a teenager with a knife in Leyland at the weekend.
Two 14-year-olds were on waste ground behind Morrisons off Olympian Way, when they were approached by a group of men.
The teens had a BMX, and one of the offenders pulled out a knife demanding they hand the bike over.
He said: “Give me the f***ing bike.”
The teen dropped the bike and the man rode off on it.
The incident, which happened at around 6pm on Saturday, was reported to police, and officers came across a group with a bike matching the description at McDonald’s on Churchill Way, around an hour later.
Police confirmed one man was in possession of a knife, and three men were arrested on suspicion of robbery.