POLICE are appealing for witnesses to an indecent assault on a teenage girl which took place on the upper deck of a double decker bus.

The 13-year-old victim was set upon by two or three teenage boys as she travelled on the number 15 bus from St Helens to Parr, some time between 9 and 9.30pm on Saturday, April 1.

Anyone who can help police can contact DC Andy Ince at St Helens CID on 0151 777 6064 or Crimestoppers on 0800 555 111.