Residents have been told by police it was a targeted rather than a random attack
Four people have been taken to hospital after a group of masked attackers launched a "frightening" knife attack at a flat.
Six men burst into the property in Peach Street, Wokingham, at about 20:00 GMT on Thursday, police said.
Three men and a woman, all aged in their 20s, were injured in the attack.
The woman and two men suffered knife wounds, although police said their injuries were not thought to be life-threatening.
Police forensic teams were seen at the property on Thursday night
A 29-year-old man sustained a minor injury and has been discharged from hospital.
Thames Valley Police described it as a "frightening, targeted attack".
The suspected offenders are described by police as black males wearing balaclavas.
Officers want to speak to a man and woman seen in a light blue Ford Focus near the flat.
The flat was sealed off by police while investigations were carried out
