Police are hunting a gang of armed robbers who stole jewellery in raids on three houses in Leeds and Bradford.
Officers said up to five men were involved in the attacks and were armed with knives and "what appeared to be a sawn-off shotgun".
The suspects are believed to be white men in their late teens or early twenties. All wore black balaclavas and black gloves.
Police have increased patrols in the affected areas.
The first raid happened on Monday at a house in Rockland Crescent, Clayton, Bradford.
The men searched the house and stole a watch.
Later the same, day five men broke in to a house in Wooler Avenue, Beeston, and threatened the occupants before making off with a quantity of gold jewellery.
At 19:45 GMT on Monday, the gang raided a home on Broad Lane, Bradford and demanded jewellery before leaving with a quantity of money.
Det Insp Ryan Bragg said a black Mitsubishi L200 vehicle was seen in the area at the time of the offences.