Yobs tied a rope across Morecambe promenade in an act which police described as ‘stupidity.’
PCSOs discovered the rope attached to a life buoy station and some inner railings on the promenade.
A spokesman for Morecambe Area Police said: “This kind of stupidity could cause serious injury to a cyclist and could endanger someone’s life if in the bay.”
Several youths were spoken to at the scene and their details taken.
Anyone with information should contact police on 101 or Crimestoppers on 0800 555 111.
Alternatively, visit Crimestoppers-org.uk to report crime online.