TEN victims were attacked and terrorised by a vicious armed gang who burst into their home.
After stealing their cash and mobile phones, the intruders left the nine terrified men and one woman locked in a room.
Now police are keen to trace witnesses who saw the gang of Chinese men arrive or leave the house on Trinity Street in Huddersfield.
The house is opposite St Patrick's Catholic club.
They burst in at 10pm on Sunday and left at 2am on Monday after subjecting their victims to the frightening four-hour ordeal.
Sgt Tim O'Sullivan, of Huddersfield police, said: "The gang was armed with weapons including stun guns, machetes and knives.
"Two of them had their hair dyed a golden yellow.
"People could well have seen them getting out of cars to go to the house or driving away afterwards.
"Does anyone remember what kind of cars they were using?"
The house is two large homes knocked into one and made into several bedsits.
One of the gang knocked on the door and when one of the victims opened it, up to 11 men burst in.
As victims arrived back home they were beaten and locked in a room.
The victims include an 18-year-old woman and nine men aged between 23 and 34.
Sgt O'Sullivan added: "They were also systematically threatened with the array of weapons. It was a terrible ordeal for them. Fortunately no-one was badly hurt."
One of the gang is aged 30 to 35, slim with short dark hair that was straight and flat to his head. He was described as scary-looking by the victims.
Another is aged 20 to 25, slim with dark hair which had golden yellow highlights in it.
He wore a red and white jacket and blue denim jeans.
A third is aged 25 to 30 and well-built with short black hair.
All the others are in their early 20s. One of them has long straight collar-length hair with golden yellow highlights in it.
Contact Det Con Steve Bedford at Huddersfield CID on 01484 436582 or Crimestoppers free and anonymously on 0800 555 111.