A TEENAGER robbed a pet shop with a knife this morning.

The male threatened a member of staff at Alison's Animals, The Parade, at about 11.45am.

He stole an undisclosed sum from the till before fleeing.

He is described as white, 5ft6ins, of medium build and wearing a purple top.

The police helicopter was dispatched to look for him.

Anyone with information should call Thames Valley Police on 0845 8 505 505 or Crimestoppers anonymously on 0800 555 111.