Police have released CCTV footage of three men who broke into a flat and attacked four occupants.
The men broke into the home, located above a shop in Lea Bridge Road at the junction with Poplars Road in Walthamstow, and attacked the occupants, all in their 20s, at 4.15pm on January 28.
The 24-year-old required 40 stitches on his face and a silver Apple Macbook was stolen.
One suspect is described as black, in his late 20s to early 30s, 6ft to 6ft 4ins tall, of muscular build, with short dreadlocked hair pulled back into a ponytail.
Suspect two is described as white, aged 25 to 30 years old, of medium build, approximately 5ft 9ins, with dark blond eyebrows. He was wearing a black and white bandana across his face and a grey hooded top with a lighter outer jacket.
The third suspect is described as a light-skinned black man, about 25 years old, approximately 6ft, of slim build, with stubble. He was wearing a black jacket and a black beaney hat.
Anyone with information is asked to contact Detective Constable Vicki Cullen, from Waltham Forest CID on 020 8721 5019.
To remain anonymous call Crimestoppers on 0800 555 111.