Police were called out to reports of a man dangling a fishing rod from a bridge over the M6.
A couple contacted police at 11am on July 12 to say they were travelling southbound on the M6 near Junction 35 when they saw a man on the bridge with a fishing rode with something large dangling off it.
The couple were concerned as the item was hanging over the bridge.
There was nobody there when police arrived and they have so far been unable to trace the man.
Anyone with information should call police on 101 or Crimestoppers on 0800 555 111.