Police are investigating a robbery at a Douglas jewellers.
It happened at about 4pm yesterday (Friday) at RHS Jewellers, on Prospect Hill.
Police say a male entered the shop and threatened a member of staff before making off with a quantity of jewellery.
He fled the area on a red and white off-road motorcycle.
There were a number of people in the area at the time.
A police spokesman said: ‘I am particularly keen to speak to a male who pursued the thief from the scene around the area of Shaws Brow car park.
‘I would like this person to come forward and speak to the police.’
He added: ‘This is an unusual incident to occur on the island and every effort is being made to locate the person responsible.’
Anyone with information should contact police headquarters on 631212 or Crimestoppers on 0800 555 111.